21654550

素因数分解:

$2^1\times 5^2\times {\mathrm{163}}^1\times {\mathrm{2657}}^1$

素因数の和:2832

約数の個数: 24

約数和(自身を含む): 40539816

約数和(自身を除く): 18885266

約数列:

[1, 2, 5, 10, 25, 50, 163, 326, 815, 1630, 2657, 4075, 5314, 8150, 13285, 26570, 66425, 132850, 433091, 866182, 2165455, 4330910, 10827275, 21654550]

約数ペア:

[(1, 21654550), (2, 10827275), (5, 4330910), (10, 2165455), (25, 866182), (50, 433091), (163, 132850), (326, 66425), (815, 26570), (1630, 13285), (2657, 8150), (4075, 5314)]