21002564

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{2423}}^1$

素因数の和:2635

約数の個数: 24

約数和(自身を含む): 40315968

約数和(自身を除く): 19313404

約数列:

[1, 2, 4, 11, 22, 44, 197, 394, 788, 2167, 2423, 4334, 4846, 8668, 9692, 26653, 53306, 106612, 477331, 954662, 1909324, 5250641, 10501282, 21002564]

約数ペア:

[(1, 21002564), (2, 10501282), (4, 5250641), (11, 1909324), (22, 954662), (44, 477331), (197, 106612), (394, 53306), (788, 26653), (2167, 9692), (2423, 8668), (4334, 4846)]