20491420

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{9067}}^1$

素因数の和:9189

約数の個数: 24

約数和(自身を含む): 43417584

約数和(自身を除く): 22926164

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 452, 565, 1130, 2260, 9067, 18134, 36268, 45335, 90670, 181340, 1024571, 2049142, 4098284, 5122855, 10245710, 20491420]

約数ペア:

[(1, 20491420), (2, 10245710), (4, 5122855), (5, 4098284), (10, 2049142), (20, 1024571), (113, 181340), (226, 90670), (452, 45335), (565, 36268), (1130, 18134), (2260, 9067)]