20995580

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9631}}^1$

素因数の和:9749

約数の個数: 24

約数和(自身を含む): 44499840

約数和(自身を除く): 23504260

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9631, 19262, 38524, 48155, 96310, 192620, 1049779, 2099558, 4199116, 5248895, 10497790, 20995580]

約数ペア:

[(1, 20995580), (2, 10497790), (4, 5248895), (5, 4199116), (10, 2099558), (20, 1049779), (109, 192620), (218, 96310), (436, 48155), (545, 38524), (1090, 19262), (2180, 9631)]