396721880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{319937}}^1$

素因数の和:319979

約数の個数: 32

約数和(自身を含む): 921421440

約数和(自身を除く): 524699560

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 319937, 639874, 1279748, 1599685, 2559496, 3199370, 6398740, 9918047, 12797480, 19836094, 39672188, 49590235, 79344376, 99180470, 198360940, 396721880]

約数ペア:

[(1, 396721880), (2, 198360940), (4, 99180470), (5, 79344376), (8, 49590235), (10, 39672188), (20, 19836094), (31, 12797480), (40, 9918047), (62, 6398740), (124, 3199370), (155, 2559496), (248, 1599685), (310, 1279748), (620, 639874), (1240, 319937)]