21052115

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{2963}}^1$

素因数の和:3011

約数の個数: 24

約数和(自身を含む): 30410640

約数和(自身を除く): 9358525

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 2963, 7105, 14815, 20741, 85927, 103705, 145187, 429635, 601489, 725935, 3007445, 4210423, 21052115]

約数ペア:

[(1, 21052115), (5, 4210423), (7, 3007445), (29, 725935), (35, 601489), (49, 429635), (145, 145187), (203, 103705), (245, 85927), (1015, 20741), (1421, 14815), (2963, 7105)]