20971440

素因数分解:

$2^4\times 3^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1$

素因数の和:121

約数の個数: 320

約数和(自身を含む): 88089600

約数和(自身を除く): 67118160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 19, 20, 21, 24, 27, 28, 30, 35, 36, 38, 40, 42, 45, 48, 54, 56, 57, 60, 63, 70, 72, 73, 76, 80, 84, 90, 95, 105, 108, 112, 114, 120, 126, 133, 135, 140, 144, 146, 152, 168, 171, 180, 189, 190, 210, 216, 219, 228, 240, 252, 266, 270, 280, 285, 292, 304, 315, 336, 342, 360, 365, 378, 380, 399, 420, 432, 438, 456, 504, 511, 513, 532, 540, 560, 570, 584, 630, 657, 665, 684, 720, 730, 756, 760, 798, 840, 855, 876, 912, 945, 1008, 1022, 1026, 1064, 1080, 1095, 1140, 1168, 1197, 1260, 1314, 1330, 1368, 1387, 1460, 1512, 1520, 1533, 1596, 1680, 1710, 1752, 1890, 1971, 1995, 2044, 2052, 2128, 2160, 2190, 2280, 2394, 2520, 2555, 2565, 2628, 2660, 2736, 2774, 2920, 3024, 3066, 3192, 3285, 3420, 3504, 3591, 3780, 3942, 3990, 4088, 4104, 4161, 4380, 4560, 4599, 4788, 5040, 5110, 5130, 5256, 5320, 5548, 5840, 5985, 6132, 6384, 6570, 6840, 6935, 7182, 7560, 7665, 7884, 7980, 8176, 8208, 8322, 8760, 9198, 9576, 9709, 9855, 10220, 10260, 10512, 10640, 11096, 11970, 12264, 12483, 13140, 13680, 13797, 13870, 14364, 15120, 15330, 15768, 15960, 16644, 17520, 17955, 18396, 19152, 19418, 19710, 20440, 20520, 20805, 22192, 22995, 23940, 24528, 24966, 26280, 27594, 27740, 28728, 29127, 30660, 31536, 31920, 33288, 35910, 36792, 37449, 38836, 39420, 40880, 41040, 41610, 45990, 47880, 48545, 49932, 52560, 55188, 55480, 57456, 58254, 61320, 62415, 66576, 68985, 71820, 73584, 74898, 77672, 78840, 83220, 87381, 91980, 95760, 97090, 99864, 110376, 110960, 116508, 122640, 124830, 137970, 143640, 145635, 149796, 155344, 157680, 166440, 174762, 183960, 187245, 194180, 199728, 220752, 233016, 249660, 262143, 275940, 287280, 291270, 299592, 332880, 349524, 367920, 374490, 388360, 436905, 466032, 499320, 524286, 551880, 582540, 599184, 699048, 748980, 776720, 873810, 998640, 1048572, 1103760, 1165080, 1310715, 1398096, 1497960, 1747620, 2097144, 2330160, 2621430, 2995920, 3495240, 4194288, 5242860, 6990480, 10485720, 20971440]

約数ペア:

[(1, 20971440), (2, 10485720), (3, 6990480), (4, 5242860), (5, 4194288), (6, 3495240), (7, 2995920), (8, 2621430), (9, 2330160), (10, 2097144), (12, 1747620), (14, 1497960), (15, 1398096), (16, 1310715), (18, 1165080), (19, 1103760), (20, 1048572), (21, 998640), (24, 873810), (27, 776720), (28, 748980), (30, 699048), (35, 599184), (36, 582540), (38, 551880), (40, 524286), (42, 499320), (45, 466032), (48, 436905), (54, 388360), (56, 374490), (57, 367920), (60, 349524), (63, 332880), (70, 299592), (72, 291270), (73, 287280), (76, 275940), (80, 262143), (84, 249660), (90, 233016), (95, 220752), (105, 199728), (108, 194180), (112, 187245), (114, 183960), (120, 174762), (126, 166440), (133, 157680), (135, 155344), (140, 149796), (144, 145635), (146, 143640), (152, 137970), (168, 124830), (171, 122640), (180, 116508), (189, 110960), (190, 110376), (210, 99864), (216, 97090), (219, 95760), (228, 91980), (240, 87381), (252, 83220), (266, 78840), (270, 77672), (280, 74898), (285, 73584), (292, 71820), (304, 68985), (315, 66576), (336, 62415), (342, 61320), (360, 58254), (365, 57456), (378, 55480), (380, 55188), (399, 52560), (420, 49932), (432, 48545), (438, 47880), (456, 45990), (504, 41610), (511, 41040), (513, 40880), (532, 39420), (540, 38836), (560, 37449), (570, 36792), (584, 35910), (630, 33288), (657, 31920), (665, 31536), (684, 30660), (720, 29127), (730, 28728), (756, 27740), (760, 27594), (798, 26280), (840, 24966), (855, 24528), (876, 23940), (912, 22995), (945, 22192), (1008, 20805), (1022, 20520), (1026, 20440), (1064, 19710), (1080, 19418), (1095, 19152), (1140, 18396), (1168, 17955), (1197, 17520), (1260, 16644), (1314, 15960), (1330, 15768), (1368, 15330), (1387, 15120), (1460, 14364), (1512, 13870), (1520, 13797), (1533, 13680), (1596, 13140), (1680, 12483), (1710, 12264), (1752, 11970), (1890, 11096), (1971, 10640), (1995, 10512), (2044, 10260), (2052, 10220), (2128, 9855), (2160, 9709), (2190, 9576), (2280, 9198), (2394, 8760), (2520, 8322), (2555, 8208), (2565, 8176), (2628, 7980), (2660, 7884), (2736, 7665), (2774, 7560), (2920, 7182), (3024, 6935), (3066, 6840), (3192, 6570), (3285, 6384), (3420, 6132), (3504, 5985), (3591, 5840), (3780, 5548), (3942, 5320), (3990, 5256), (4088, 5130), (4104, 5110), (4161, 5040), (4380, 4788), (4560, 4599)]