21902405

素因数分解:

$5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{15263}}^1$

素因数の和:15316

約数の個数: 16

約数和(自身を含む): 30772224

約数和(自身を除く): 8869819

約数列:

[1, 5, 7, 35, 41, 205, 287, 1435, 15263, 76315, 106841, 534205, 625783, 3128915, 4380481, 21902405]

約数ペア:

[(1, 21902405), (5, 4380481), (7, 3128915), (35, 625783), (41, 534205), (205, 106841), (287, 76315), (1435, 15263)]