401140

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{647}}^1$

素因数の和:687

約数の個数: 24

約数和(自身を含む): 870912

約数和(自身を除く): 469772

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 647, 1294, 2588, 3235, 6470, 12940, 20057, 40114, 80228, 100285, 200570, 401140]

約数ペア:

[(1, 401140), (2, 200570), (4, 100285), (5, 80228), (10, 40114), (20, 20057), (31, 12940), (62, 6470), (124, 3235), (155, 2588), (310, 1294), (620, 647)]