20820415

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1319}}^1$

素因数の和:1383

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 11113025

約数列:

[1, 5, 7, 11, 35, 41, 55, 77, 205, 287, 385, 451, 1319, 1435, 2255, 3157, 6595, 9233, 14509, 15785, 46165, 54079, 72545, 101563, 270395, 378553, 507815, 594869, 1892765, 2974345, 4164083, 20820415]

約数ペア:

[(1, 20820415), (5, 4164083), (7, 2974345), (11, 1892765), (35, 594869), (41, 507815), (55, 378553), (77, 270395), (205, 101563), (287, 72545), (385, 54079), (451, 46165), (1319, 15785), (1435, 14509), (2255, 9233), (3157, 6595)]