208045720

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{149}}^1\times {\mathrm{521}}^1$

素因数の和:748

約数の個数: 64

約数和(自身を含む): 479196000

約数和(自身を除く): 271150280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 149, 268, 298, 335, 521, 536, 596, 670, 745, 1042, 1192, 1340, 1490, 2084, 2605, 2680, 2980, 4168, 5210, 5960, 9983, 10420, 19966, 20840, 34907, 39932, 49915, 69814, 77629, 79864, 99830, 139628, 155258, 174535, 199660, 279256, 310516, 349070, 388145, 399320, 621032, 698140, 776290, 1396280, 1552580, 3105160, 5201143, 10402286, 20804572, 26005715, 41609144, 52011430, 104022860, 208045720]

約数ペア:

[(1, 208045720), (2, 104022860), (4, 52011430), (5, 41609144), (8, 26005715), (10, 20804572), (20, 10402286), (40, 5201143), (67, 3105160), (134, 1552580), (149, 1396280), (268, 776290), (298, 698140), (335, 621032), (521, 399320), (536, 388145), (596, 349070), (670, 310516), (745, 279256), (1042, 199660), (1192, 174535), (1340, 155258), (1490, 139628), (2084, 99830), (2605, 79864), (2680, 77629), (2980, 69814), (4168, 49915), (5210, 39932), (5960, 34907), (9983, 20840), (10420, 19966)]