20807280

素因数分解:

$2^4\times 3^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1$

素因数の和:70

約数の個数: 300

約数和(自身を含む): 82371960

約数和(自身を除く): 61564680

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 19, 20, 24, 26, 27, 30, 36, 38, 39, 40, 45, 48, 52, 54, 57, 60, 65, 72, 76, 78, 80, 81, 90, 95, 104, 108, 114, 117, 120, 130, 135, 144, 152, 156, 162, 169, 171, 180, 190, 195, 208, 216, 228, 234, 240, 247, 260, 270, 285, 304, 312, 324, 338, 342, 351, 360, 380, 390, 405, 432, 456, 468, 494, 507, 513, 520, 540, 570, 585, 624, 648, 676, 684, 702, 720, 741, 760, 780, 810, 845, 855, 912, 936, 988, 1014, 1026, 1040, 1053, 1080, 1140, 1170, 1235, 1296, 1352, 1368, 1404, 1482, 1520, 1521, 1539, 1560, 1620, 1690, 1710, 1755, 1872, 1976, 2028, 2052, 2106, 2160, 2223, 2280, 2340, 2470, 2535, 2565, 2704, 2736, 2808, 2964, 3042, 3078, 3120, 3211, 3240, 3380, 3420, 3510, 3705, 3952, 4056, 4104, 4212, 4446, 4560, 4563, 4680, 4940, 5070, 5130, 5265, 5616, 5928, 6084, 6156, 6422, 6480, 6669, 6760, 6840, 7020, 7410, 7605, 7695, 8112, 8208, 8424, 8892, 9126, 9360, 9633, 9880, 10140, 10260, 10530, 11115, 11856, 12168, 12312, 12844, 13338, 13520, 13680, 13689, 14040, 14820, 15210, 15390, 16055, 16848, 17784, 18252, 19266, 19760, 20007, 20280, 20520, 21060, 22230, 22815, 24336, 24624, 25688, 26676, 27378, 28080, 28899, 29640, 30420, 30780, 32110, 33345, 35568, 36504, 38532, 40014, 40560, 41040, 42120, 44460, 45630, 48165, 51376, 53352, 54756, 57798, 59280, 60840, 61560, 64220, 66690, 68445, 73008, 77064, 80028, 84240, 86697, 88920, 91260, 96330, 100035, 106704, 109512, 115596, 121680, 123120, 128440, 133380, 136890, 144495, 154128, 160056, 173394, 177840, 182520, 192660, 200070, 219024, 231192, 256880, 260091, 266760, 273780, 288990, 320112, 346788, 365040, 385320, 400140, 433485, 462384, 520182, 533520, 547560, 577980, 693576, 770640, 800280, 866970, 1040364, 1095120, 1155960, 1300455, 1387152, 1600560, 1733940, 2080728, 2311920, 2600910, 3467880, 4161456, 5201820, 6935760, 10403640, 20807280]

約数ペア:

[(1, 20807280), (2, 10403640), (3, 6935760), (4, 5201820), (5, 4161456), (6, 3467880), (8, 2600910), (9, 2311920), (10, 2080728), (12, 1733940), (13, 1600560), (15, 1387152), (16, 1300455), (18, 1155960), (19, 1095120), (20, 1040364), (24, 866970), (26, 800280), (27, 770640), (30, 693576), (36, 577980), (38, 547560), (39, 533520), (40, 520182), (45, 462384), (48, 433485), (52, 400140), (54, 385320), (57, 365040), (60, 346788), (65, 320112), (72, 288990), (76, 273780), (78, 266760), (80, 260091), (81, 256880), (90, 231192), (95, 219024), (104, 200070), (108, 192660), (114, 182520), (117, 177840), (120, 173394), (130, 160056), (135, 154128), (144, 144495), (152, 136890), (156, 133380), (162, 128440), (169, 123120), (171, 121680), (180, 115596), (190, 109512), (195, 106704), (208, 100035), (216, 96330), (228, 91260), (234, 88920), (240, 86697), (247, 84240), (260, 80028), (270, 77064), (285, 73008), (304, 68445), (312, 66690), (324, 64220), (338, 61560), (342, 60840), (351, 59280), (360, 57798), (380, 54756), (390, 53352), (405, 51376), (432, 48165), (456, 45630), (468, 44460), (494, 42120), (507, 41040), (513, 40560), (520, 40014), (540, 38532), (570, 36504), (585, 35568), (624, 33345), (648, 32110), (676, 30780), (684, 30420), (702, 29640), (720, 28899), (741, 28080), (760, 27378), (780, 26676), (810, 25688), (845, 24624), (855, 24336), (912, 22815), (936, 22230), (988, 21060), (1014, 20520), (1026, 20280), (1040, 20007), (1053, 19760), (1080, 19266), (1140, 18252), (1170, 17784), (1235, 16848), (1296, 16055), (1352, 15390), (1368, 15210), (1404, 14820), (1482, 14040), (1520, 13689), (1521, 13680), (1539, 13520), (1560, 13338), (1620, 12844), (1690, 12312), (1710, 12168), (1755, 11856), (1872, 11115), (1976, 10530), (2028, 10260), (2052, 10140), (2106, 9880), (2160, 9633), (2223, 9360), (2280, 9126), (2340, 8892), (2470, 8424), (2535, 8208), (2565, 8112), (2704, 7695), (2736, 7605), (2808, 7410), (2964, 7020), (3042, 6840), (3078, 6760), (3120, 6669), (3211, 6480), (3240, 6422), (3380, 6156), (3420, 6084), (3510, 5928), (3705, 5616), (3952, 5265), (4056, 5130), (4104, 5070), (4212, 4940), (4446, 4680), (4560, 4563)]