21351005

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7639}}^1$

素因数の和:7700

約数の個数: 16

約数和(自身を含む): 28237440

約数和(自身を除く): 6886435

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7639, 38195, 99307, 328477, 496535, 1642385, 4270201, 21351005]

約数ペア:

[(1, 21351005), (5, 4270201), (13, 1642385), (43, 496535), (65, 328477), (215, 99307), (559, 38195), (2795, 7639)]