20171977

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{461}}^1$

素因数の和:541

約数の個数: 24

約数和(自身を含む): 25280640

約数和(自身を除く): 5108663

約数列:

[1, 7, 19, 47, 49, 133, 329, 461, 893, 931, 2303, 3227, 6251, 8759, 21667, 22589, 43757, 61313, 151669, 411673, 429191, 1061683, 2881711, 20171977]

約数ペア:

[(1, 20171977), (7, 2881711), (19, 1061683), (47, 429191), (49, 411673), (133, 151669), (329, 61313), (461, 43757), (893, 22589), (931, 21667), (2303, 8759), (3227, 6251)]