21131612

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{2851}}^1$

素因数の和:2981

約数の個数: 24

約数和(自身を含む): 39528720

約数和(自身を除く): 18397108

約数列:

[1, 2, 4, 17, 34, 68, 109, 218, 436, 1853, 2851, 3706, 5702, 7412, 11404, 48467, 96934, 193868, 310759, 621518, 1243036, 5282903, 10565806, 21131612]

約数ペア:

[(1, 21131612), (2, 10565806), (4, 5282903), (17, 1243036), (34, 621518), (68, 310759), (109, 193868), (218, 96934), (436, 48467), (1853, 11404), (2851, 7412), (3706, 5702)]