21240415

素因数分解:

$5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{4019}}^1$

素因数の和:4182

約数の個数: 16

約数和(自身を含む): 29329920

約数和(自身を除く): 8089505

約数列:

[1, 5, 7, 35, 151, 755, 1057, 4019, 5285, 20095, 28133, 140665, 606869, 3034345, 4248083, 21240415]

約数ペア:

[(1, 21240415), (5, 4248083), (7, 3034345), (35, 606869), (151, 140665), (755, 28133), (1057, 20095), (4019, 5285)]