21188335

素因数分解:

$5^1\times 7^2\times {\mathrm{197}}^1\times {\mathrm{439}}^1$

素因数の和:655

約数の個数: 24

約数和(自身を含む): 29795040

約数和(自身を除く): 8606705

約数列:

[1, 5, 7, 35, 49, 197, 245, 439, 985, 1379, 2195, 3073, 6895, 9653, 15365, 21511, 48265, 86483, 107555, 432415, 605381, 3026905, 4237667, 21188335]

約数ペア:

[(1, 21188335), (5, 4237667), (7, 3026905), (35, 605381), (49, 432415), (197, 107555), (245, 86483), (439, 48265), (985, 21511), (1379, 15365), (2195, 9653), (3073, 6895)]