21918910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1213}}^1$

素因数の和:1372

約数の個数: 32

約数和(自身を含む): 42829920

約数和(自身を除く): 20911010

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 139, 278, 695, 1213, 1390, 1807, 2426, 3614, 6065, 9035, 12130, 15769, 18070, 31538, 78845, 157690, 168607, 337214, 843035, 1686070, 2191891, 4383782, 10959455, 21918910]

約数ペア:

[(1, 21918910), (2, 10959455), (5, 4383782), (10, 2191891), (13, 1686070), (26, 843035), (65, 337214), (130, 168607), (139, 157690), (278, 78845), (695, 31538), (1213, 18070), (1390, 15769), (1807, 12130), (2426, 9035), (3614, 6065)]