21705170

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19913}}^1$

素因数の和:20029

約数の個数: 16

約数和(自身を含む): 39429720

約数和(自身を除く): 17724550

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19913, 39826, 99565, 199130, 2170517, 4341034, 10852585, 21705170]

約数ペア:

[(1, 21705170), (2, 10852585), (5, 4341034), (10, 2170517), (109, 199130), (218, 99565), (545, 39826), (1090, 19913)]