21375305

素因数分解:

$5^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{1523}}^1$

素因数の和:1936

約数の個数: 16

約数和(自身を含む): 29407104

約数和(自身を除く): 8031799

約数列:

[1, 5, 7, 35, 401, 1523, 2005, 2807, 7615, 10661, 14035, 53305, 610723, 3053615, 4275061, 21375305]

約数ペア:

[(1, 21375305), (5, 4275061), (7, 3053615), (35, 610723), (401, 53305), (1523, 14035), (2005, 10661), (2807, 7615)]