420550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{647}}^1$

素因数の和:672

約数の個数: 24

約数和(自身を含む): 843696

約数和(自身を除く): 423146

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 325, 647, 650, 1294, 3235, 6470, 8411, 16175, 16822, 32350, 42055, 84110, 210275, 420550]

約数ペア:

[(1, 420550), (2, 210275), (5, 84110), (10, 42055), (13, 32350), (25, 16822), (26, 16175), (50, 8411), (65, 6470), (130, 3235), (325, 1294), (647, 650)]