20218665

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43481}}^1$

素因数の和:43520

約数の個数: 16

約数和(自身を含む): 33394176

約数和(自身を除く): 13175511

約数列:

[1, 3, 5, 15, 31, 93, 155, 465, 43481, 130443, 217405, 652215, 1347911, 4043733, 6739555, 20218665]

約数ペア:

[(1, 20218665), (3, 6739555), (5, 4043733), (15, 1347911), (31, 652215), (93, 217405), (155, 130443), (465, 43481)]