21132220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25771}}^1$

素因数の和:25821

約数の個数: 24

約数和(自身を含む): 45461808

約数和(自身を除く): 24329588

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25771, 51542, 103084, 128855, 257710, 515420, 1056611, 2113222, 4226444, 5283055, 10566110, 21132220]

約数ペア:

[(1, 21132220), (2, 10566110), (4, 5283055), (5, 4226444), (10, 2113222), (20, 1056611), (41, 515420), (82, 257710), (164, 128855), (205, 103084), (410, 51542), (820, 25771)]