21216415

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{8971}}^1$

素因数の和:9030

約数の個数: 16

約数和(自身を含む): 28423296

約数和(自身を除く): 7206881

約数列:

[1, 5, 11, 43, 55, 215, 473, 2365, 8971, 44855, 98681, 385753, 493405, 1928765, 4243283, 21216415]

約数ペア:

[(1, 21216415), (5, 4243283), (11, 1928765), (43, 493405), (55, 385753), (215, 98681), (473, 44855), (2365, 8971)]