21795641

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{571}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 27387360

約数和(自身を除く): 5591719

約数列:

[1, 7, 19, 41, 49, 133, 287, 571, 779, 931, 2009, 3997, 5453, 10849, 23411, 27979, 38171, 75943, 163877, 444809, 531601, 1147139, 3113663, 21795641]

約数ペア:

[(1, 21795641), (7, 3113663), (19, 1147139), (41, 531601), (49, 444809), (133, 163877), (287, 75943), (571, 38171), (779, 27979), (931, 23411), (2009, 10849), (3997, 5453)]