257981380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1\times {\mathrm{1741}}^1$

素因数の和:2020

約数の個数: 48

約数和(自身を含む): 561899520

約数和(自身を除く): 303918140

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 239, 310, 478, 620, 956, 1195, 1741, 2390, 3482, 4780, 6964, 7409, 8705, 14818, 17410, 29636, 34820, 37045, 53971, 74090, 107942, 148180, 215884, 269855, 416099, 539710, 832198, 1079420, 1664396, 2080495, 4160990, 8321980, 12899069, 25798138, 51596276, 64495345, 128990690, 257981380]

約数ペア:

[(1, 257981380), (2, 128990690), (4, 64495345), (5, 51596276), (10, 25798138), (20, 12899069), (31, 8321980), (62, 4160990), (124, 2080495), (155, 1664396), (239, 1079420), (310, 832198), (478, 539710), (620, 416099), (956, 269855), (1195, 215884), (1741, 148180), (2390, 107942), (3482, 74090), (4780, 53971), (6964, 37045), (7409, 34820), (8705, 29636), (14818, 17410)]