21257870

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73303}}^1$

素因数の和:73339

約数の個数: 16

約数和(自身を含む): 39584160

約数和(自身を除く): 18326290

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 73303, 146606, 366515, 733030, 2125787, 4251574, 10628935, 21257870]

約数ペア:

[(1, 21257870), (2, 10628935), (5, 4251574), (10, 2125787), (29, 733030), (58, 366515), (145, 146606), (290, 73303)]