20204513

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:257

約数の個数: 24

約数和(自身を含む): 24562440

約数和(自身を除く): 4357927

約数列:

[1, 7, 41, 49, 89, 113, 287, 623, 791, 2009, 3649, 4361, 4633, 5537, 10057, 25543, 32431, 70399, 178801, 227017, 412337, 492793, 2886359, 20204513]

約数ペア:

[(1, 20204513), (7, 2886359), (41, 492793), (49, 412337), (89, 227017), (113, 178801), (287, 70399), (623, 32431), (791, 25543), (2009, 10057), (3649, 5537), (4361, 4633)]