21965905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 30159360

約数和(自身を除く): 8193455

約数列:

[1, 5, 13, 29, 43, 65, 145, 215, 271, 377, 559, 1247, 1355, 1885, 2795, 3523, 6235, 7859, 11653, 16211, 17615, 39295, 58265, 81055, 102167, 151489, 337937, 510835, 757445, 1689685, 4393181, 21965905]

約数ペア:

[(1, 21965905), (5, 4393181), (13, 1689685), (29, 757445), (43, 510835), (65, 337937), (145, 151489), (215, 102167), (271, 81055), (377, 58265), (559, 39295), (1247, 17615), (1355, 16211), (1885, 11653), (2795, 7859), (3523, 6235)]