21220857

素因数分解:

$3^2\times 7^1\times {\mathrm{167}}^1\times {\mathrm{2017}}^1$

素因数の和:2197

約数の個数: 24

約数和(自身を含む): 35258496

約数和(自身を除く): 14037639

約数列:

[1, 3, 7, 9, 21, 63, 167, 501, 1169, 1503, 2017, 3507, 6051, 10521, 14119, 18153, 42357, 127071, 336839, 1010517, 2357873, 3031551, 7073619, 21220857]

約数ペア:

[(1, 21220857), (3, 7073619), (7, 3031551), (9, 2357873), (21, 1010517), (63, 336839), (167, 127071), (501, 42357), (1169, 18153), (1503, 14119), (2017, 10521), (3507, 6051)]