21301280

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1$

素因数の和:72

約数の個数: 288

約数和(自身を含む): 72394560

約数和(自身を除く): 51093280

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 19, 20, 22, 26, 28, 32, 35, 38, 40, 44, 49, 52, 55, 56, 65, 70, 76, 77, 80, 88, 91, 95, 98, 104, 110, 112, 130, 133, 140, 143, 152, 154, 160, 176, 182, 190, 196, 208, 209, 220, 224, 245, 247, 260, 266, 280, 286, 304, 308, 352, 364, 380, 385, 392, 416, 418, 440, 455, 490, 494, 520, 532, 539, 560, 572, 608, 616, 637, 665, 715, 728, 760, 770, 784, 836, 880, 910, 931, 980, 988, 1001, 1040, 1045, 1064, 1078, 1120, 1144, 1232, 1235, 1274, 1330, 1430, 1456, 1463, 1520, 1540, 1568, 1672, 1729, 1760, 1820, 1862, 1960, 1976, 2002, 2080, 2090, 2128, 2156, 2288, 2464, 2470, 2548, 2660, 2695, 2717, 2860, 2912, 2926, 3040, 3080, 3185, 3344, 3458, 3640, 3724, 3920, 3952, 4004, 4180, 4256, 4312, 4576, 4655, 4940, 5005, 5096, 5320, 5390, 5434, 5720, 5852, 6160, 6370, 6688, 6916, 7007, 7280, 7315, 7448, 7840, 7904, 8008, 8360, 8624, 8645, 9310, 9880, 10010, 10192, 10241, 10640, 10780, 10868, 11440, 11704, 12103, 12320, 12740, 13585, 13832, 14014, 14560, 14630, 14896, 16016, 16720, 17248, 17290, 18620, 19019, 19760, 20020, 20384, 20482, 21280, 21560, 21736, 22880, 23408, 24206, 25480, 27170, 27664, 28028, 29260, 29792, 32032, 33440, 34580, 35035, 37240, 38038, 39520, 40040, 40964, 43120, 43472, 46816, 48412, 50960, 51205, 54340, 55328, 56056, 58520, 60515, 69160, 70070, 74480, 76076, 80080, 81928, 86240, 86944, 95095, 96824, 101920, 102410, 108680, 112112, 117040, 121030, 133133, 138320, 140140, 148960, 152152, 160160, 163856, 190190, 193648, 204820, 217360, 224224, 234080, 242060, 266266, 276640, 280280, 304304, 327712, 380380, 387296, 409640, 434720, 484120, 532532, 560560, 608608, 665665, 760760, 819280, 968240, 1065064, 1121120, 1331330, 1521520, 1638560, 1936480, 2130128, 2662660, 3043040, 4260256, 5325320, 10650640, 21301280]

約数ペア:

[(1, 21301280), (2, 10650640), (4, 5325320), (5, 4260256), (7, 3043040), (8, 2662660), (10, 2130128), (11, 1936480), (13, 1638560), (14, 1521520), (16, 1331330), (19, 1121120), (20, 1065064), (22, 968240), (26, 819280), (28, 760760), (32, 665665), (35, 608608), (38, 560560), (40, 532532), (44, 484120), (49, 434720), (52, 409640), (55, 387296), (56, 380380), (65, 327712), (70, 304304), (76, 280280), (77, 276640), (80, 266266), (88, 242060), (91, 234080), (95, 224224), (98, 217360), (104, 204820), (110, 193648), (112, 190190), (130, 163856), (133, 160160), (140, 152152), (143, 148960), (152, 140140), (154, 138320), (160, 133133), (176, 121030), (182, 117040), (190, 112112), (196, 108680), (208, 102410), (209, 101920), (220, 96824), (224, 95095), (245, 86944), (247, 86240), (260, 81928), (266, 80080), (280, 76076), (286, 74480), (304, 70070), (308, 69160), (352, 60515), (364, 58520), (380, 56056), (385, 55328), (392, 54340), (416, 51205), (418, 50960), (440, 48412), (455, 46816), (490, 43472), (494, 43120), (520, 40964), (532, 40040), (539, 39520), (560, 38038), (572, 37240), (608, 35035), (616, 34580), (637, 33440), (665, 32032), (715, 29792), (728, 29260), (760, 28028), (770, 27664), (784, 27170), (836, 25480), (880, 24206), (910, 23408), (931, 22880), (980, 21736), (988, 21560), (1001, 21280), (1040, 20482), (1045, 20384), (1064, 20020), (1078, 19760), (1120, 19019), (1144, 18620), (1232, 17290), (1235, 17248), (1274, 16720), (1330, 16016), (1430, 14896), (1456, 14630), (1463, 14560), (1520, 14014), (1540, 13832), (1568, 13585), (1672, 12740), (1729, 12320), (1760, 12103), (1820, 11704), (1862, 11440), (1960, 10868), (1976, 10780), (2002, 10640), (2080, 10241), (2090, 10192), (2128, 10010), (2156, 9880), (2288, 9310), (2464, 8645), (2470, 8624), (2548, 8360), (2660, 8008), (2695, 7904), (2717, 7840), (2860, 7448), (2912, 7315), (2926, 7280), (3040, 7007), (3080, 6916), (3185, 6688), (3344, 6370), (3458, 6160), (3640, 5852), (3724, 5720), (3920, 5434), (3952, 5390), (4004, 5320), (4180, 5096), (4256, 5005), (4312, 4940), (4576, 4655)]