21316715

素因数分解:

$5^1\times 7^2\times {\mathrm{167}}^1\times {\mathrm{521}}^1$

素因数の和:707

約数の個数: 24

約数和(自身を含む): 29992032

約数和(自身を除く): 8675317

約数列:

[1, 5, 7, 35, 49, 167, 245, 521, 835, 1169, 2605, 3647, 5845, 8183, 18235, 25529, 40915, 87007, 127645, 435035, 609049, 3045245, 4263343, 21316715]

約数ペア:

[(1, 21316715), (5, 4263343), (7, 3045245), (35, 609049), (49, 435035), (167, 127645), (245, 87007), (521, 40915), (835, 25529), (1169, 18235), (2605, 8183), (3647, 5845)]