21001805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{383}}^1\times {\mathrm{997}}^1$

素因数の和:1396

約数の個数: 16

約数和(自身を含む): 27592704

約数和(自身を除く): 6590899

約数列:

[1, 5, 11, 55, 383, 997, 1915, 4213, 4985, 10967, 21065, 54835, 381851, 1909255, 4200361, 21001805]

約数ペア:

[(1, 21001805), (5, 4200361), (11, 1909255), (55, 381851), (383, 54835), (997, 21065), (1915, 10967), (4213, 4985)]