20999721

素因数分解:

$3^1\times {\mathrm{151}}^2\times {\mathrm{307}}^1$

素因数の和:612

約数の個数: 12

約数和(自身を含む): 28278096

約数和(自身を除く): 7278375

約数列:

[1, 3, 151, 307, 453, 921, 22801, 46357, 68403, 139071, 6999907, 20999721]

約数ペア:

[(1, 20999721), (3, 6999907), (151, 139071), (307, 68403), (453, 46357), (921, 22801)]