21805450

素因数分解:

$2^1\times 5^2\times {\mathrm{109}}^1\times {\mathrm{4001}}^1$

素因数の和:4122

約数の個数: 24

約数和(自身を含む): 40940460

約数和(自身を除く): 19135010

約数列:

[1, 2, 5, 10, 25, 50, 109, 218, 545, 1090, 2725, 4001, 5450, 8002, 20005, 40010, 100025, 200050, 436109, 872218, 2180545, 4361090, 10902725, 21805450]

約数ペア:

[(1, 21805450), (2, 10902725), (5, 4361090), (10, 2180545), (25, 872218), (50, 436109), (109, 200050), (218, 100025), (545, 40010), (1090, 20005), (2725, 8002), (4001, 5450)]