21801605

素因数分解:

$5^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{2029}}^1$

素因数の和:2348

約数の個数: 16

約数和(自身を含む): 30011520

約数和(自身を除く): 8209915

約数列:

[1, 5, 7, 35, 307, 1535, 2029, 2149, 10145, 10745, 14203, 71015, 622903, 3114515, 4360321, 21801605]

約数ペア:

[(1, 21801605), (5, 4360321), (7, 3114515), (35, 622903), (307, 71015), (1535, 14203), (2029, 10745), (2149, 10145)]