20989755

素因数分解:

$3^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{3089}}^1$

素因数の和:3251

約数の個数: 24

約数和(自身を含む): 36635040

約数和(自身を除く): 15645285

約数列:

[1, 3, 5, 9, 15, 45, 151, 453, 755, 1359, 2265, 3089, 6795, 9267, 15445, 27801, 46335, 139005, 466439, 1399317, 2332195, 4197951, 6996585, 20989755]

約数ペア:

[(1, 20989755), (3, 6996585), (5, 4197951), (9, 2332195), (15, 1399317), (45, 466439), (151, 139005), (453, 46335), (755, 27801), (1359, 15445), (2265, 9267), (3089, 6795)]