21690992

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{25579}}^1$

素因数の和:25640

約数の個数: 20

約数和(自身を含む): 42820920

約数和(自身を除く): 21129928

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 25579, 51158, 102316, 204632, 409264, 1355687, 2711374, 5422748, 10845496, 21690992]

約数ペア:

[(1, 21690992), (2, 10845496), (4, 5422748), (8, 2711374), (16, 1355687), (53, 409264), (106, 204632), (212, 102316), (424, 51158), (848, 25579)]