18900005

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{5171}}^1$

素因数の和:5236

約数の個数: 16

約数和(自身を含む): 24577344

約数和(自身を除く): 5677339

約数列:

[1, 5, 17, 43, 85, 215, 731, 3655, 5171, 25855, 87907, 222353, 439535, 1111765, 3780001, 18900005]

約数ペア:

[(1, 18900005), (5, 3780001), (17, 1111765), (43, 439535), (85, 222353), (215, 87907), (731, 25855), (3655, 5171)]