12421521

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2777}}^1$

素因数の和:2861

約数の個数: 24

約数和(自身を含む): 20801664

約数和(自身を除く): 8380143

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 2777, 4473, 8331, 19439, 24993, 58317, 174951, 197167, 591501, 1380169, 1774503, 4140507, 12421521]

約数ペア:

[(1, 12421521), (3, 4140507), (7, 1774503), (9, 1380169), (21, 591501), (63, 197167), (71, 174951), (213, 58317), (497, 24993), (639, 19439), (1491, 8331), (2777, 4473)]