3990940

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 8918784

約数和(自身を除く): 4927844

約数列:

[1, 2, 4, 5, 10, 20, 31, 41, 62, 82, 124, 155, 157, 164, 205, 310, 314, 410, 620, 628, 785, 820, 1271, 1570, 2542, 3140, 4867, 5084, 6355, 6437, 9734, 12710, 12874, 19468, 24335, 25420, 25748, 32185, 48670, 64370, 97340, 128740, 199547, 399094, 798188, 997735, 1995470, 3990940]

約数ペア:

[(1, 3990940), (2, 1995470), (4, 997735), (5, 798188), (10, 399094), (20, 199547), (31, 128740), (41, 97340), (62, 64370), (82, 48670), (124, 32185), (155, 25748), (157, 25420), (164, 24335), (205, 19468), (310, 12874), (314, 12710), (410, 9734), (620, 6437), (628, 6355), (785, 5084), (820, 4867), (1271, 3140), (1570, 2542)]