21738639

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{809}}^1$

素因数の和:891

約数の個数: 24

約数和(自身を含む): 32017680

約数和(自身を除く): 10279041

約数列:

[1, 3, 13, 39, 53, 159, 169, 507, 689, 809, 2067, 2427, 8957, 10517, 26871, 31551, 42877, 128631, 136721, 410163, 557401, 1672203, 7246213, 21738639]

約数ペア:

[(1, 21738639), (3, 7246213), (13, 1672203), (39, 557401), (53, 410163), (159, 136721), (169, 128631), (507, 42877), (689, 31551), (809, 26871), (2067, 10517), (2427, 8957)]