20178837

素因数分解:

$3^2\times 7^2\times {\mathrm{45757}}^1$

素因数の和:45777

約数の個数: 18

約数和(自身を含む): 33906678

約数和(自身を除く): 13727841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45757, 137271, 320299, 411813, 960897, 2242093, 2882691, 6726279, 20178837]

約数ペア:

[(1, 20178837), (3, 6726279), (7, 2882691), (9, 2242093), (21, 960897), (49, 411813), (63, 320299), (147, 137271), (441, 45757)]