20895021

素因数分解:

$3^2\times 7^2\times {\mathrm{47381}}^1$

素因数の和:47401

約数の個数: 18

約数和(自身を含む): 35110062

約数和(自身を除く): 14215041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 47381, 142143, 331667, 426429, 995001, 2321669, 2985003, 6965007, 20895021]

約数ペア:

[(1, 20895021), (3, 6965007), (7, 2985003), (9, 2321669), (21, 995001), (49, 426429), (63, 331667), (147, 142143), (441, 47381)]