20764640

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{149}}^1$

素因数の和:244

約数の個数: 96

約数和(自身を含む): 53978400

約数和(自身を除く): 33213760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 67, 80, 104, 130, 134, 149, 160, 208, 260, 268, 298, 335, 416, 520, 536, 596, 670, 745, 871, 1040, 1072, 1192, 1340, 1490, 1742, 1937, 2080, 2144, 2384, 2680, 2980, 3484, 3874, 4355, 4768, 5360, 5960, 6968, 7748, 8710, 9685, 9983, 10720, 11920, 13936, 15496, 17420, 19370, 19966, 23840, 27872, 30992, 34840, 38740, 39932, 49915, 61984, 69680, 77480, 79864, 99830, 129779, 139360, 154960, 159728, 199660, 259558, 309920, 319456, 399320, 519116, 648895, 798640, 1038232, 1297790, 1597280, 2076464, 2595580, 4152928, 5191160, 10382320, 20764640]

約数ペア:

[(1, 20764640), (2, 10382320), (4, 5191160), (5, 4152928), (8, 2595580), (10, 2076464), (13, 1597280), (16, 1297790), (20, 1038232), (26, 798640), (32, 648895), (40, 519116), (52, 399320), (65, 319456), (67, 309920), (80, 259558), (104, 199660), (130, 159728), (134, 154960), (149, 139360), (160, 129779), (208, 99830), (260, 79864), (268, 77480), (298, 69680), (335, 61984), (416, 49915), (520, 39932), (536, 38740), (596, 34840), (670, 30992), (745, 27872), (871, 23840), (1040, 19966), (1072, 19370), (1192, 17420), (1340, 15496), (1490, 13936), (1742, 11920), (1937, 10720), (2080, 9983), (2144, 9685), (2384, 8710), (2680, 7748), (2980, 6968), (3484, 5960), (3874, 5360), (4355, 4768)]