21791427

素因数分解:

$3^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{2797}}^1$

素因数の和:2867

約数の個数: 24

約数和(自身を含む): 34448976

約数和(自身を除く): 12657549

約数列:

[1, 3, 7, 21, 49, 53, 147, 159, 371, 1113, 2597, 2797, 7791, 8391, 19579, 58737, 137053, 148241, 411159, 444723, 1037687, 3113061, 7263809, 21791427]

約数ペア:

[(1, 21791427), (3, 7263809), (7, 3113061), (21, 1037687), (49, 444723), (53, 411159), (147, 148241), (159, 137053), (371, 58737), (1113, 19579), (2597, 8391), (2797, 7791)]