404996980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{154579}}^1$

素因数の和:154719

約数の個数: 24

約数和(自身を含む): 856991520

約数和(自身を除く): 451994540

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 154579, 309158, 618316, 772895, 1545790, 3091580, 20249849, 40499698, 80999396, 101249245, 202498490, 404996980]

約数ペア:

[(1, 404996980), (2, 202498490), (4, 101249245), (5, 80999396), (10, 40499698), (20, 20249849), (131, 3091580), (262, 1545790), (524, 772895), (655, 618316), (1310, 309158), (2620, 154579)]