20931615

素因数分解:

$3^4\times 5^1\times {\mathrm{51683}}^1$

素因数の和:51700

約数の個数: 20

約数和(自身を含む): 37522584

約数和(自身を除く): 16590969

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51683, 155049, 258415, 465147, 775245, 1395441, 2325735, 4186323, 6977205, 20931615]

約数ペア:

[(1, 20931615), (3, 6977205), (5, 4186323), (9, 2325735), (15, 1395441), (27, 775245), (45, 465147), (81, 258415), (135, 155049), (405, 51683)]