399115280

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{163}}^1\times {\mathrm{241}}^1$

素因数の和:544

約数の個数: 80

約数和(自身を含む): 944891904

約数和(自身を除く): 545776624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 163, 241, 254, 326, 482, 508, 635, 652, 815, 964, 1016, 1205, 1270, 1304, 1630, 1928, 2032, 2410, 2540, 2608, 3260, 3856, 4820, 5080, 6520, 9640, 10160, 13040, 19280, 20701, 30607, 39283, 41402, 61214, 78566, 82804, 103505, 122428, 153035, 157132, 165608, 196415, 207010, 244856, 306070, 314264, 331216, 392830, 414020, 489712, 612140, 628528, 785660, 828040, 1224280, 1571320, 1656080, 2448560, 3142640, 4988941, 9977882, 19955764, 24944705, 39911528, 49889410, 79823056, 99778820, 199557640, 399115280]

約数ペア:

[(1, 399115280), (2, 199557640), (4, 99778820), (5, 79823056), (8, 49889410), (10, 39911528), (16, 24944705), (20, 19955764), (40, 9977882), (80, 4988941), (127, 3142640), (163, 2448560), (241, 1656080), (254, 1571320), (326, 1224280), (482, 828040), (508, 785660), (635, 628528), (652, 612140), (815, 489712), (964, 414020), (1016, 392830), (1205, 331216), (1270, 314264), (1304, 306070), (1630, 244856), (1928, 207010), (2032, 196415), (2410, 165608), (2540, 157132), (2608, 153035), (3260, 122428), (3856, 103505), (4820, 82804), (5080, 78566), (6520, 61214), (9640, 41402), (10160, 39283), (13040, 30607), (19280, 20701)]