21387020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62903}}^1$

素因数の和:62929

約数の個数: 24

約数和(自身を含む): 47555424

約数和(自身を除く): 26168404

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62903, 125806, 251612, 314515, 629030, 1069351, 1258060, 2138702, 4277404, 5346755, 10693510, 21387020]

約数ペア:

[(1, 21387020), (2, 10693510), (4, 5346755), (5, 4277404), (10, 2138702), (17, 1258060), (20, 1069351), (34, 629030), (68, 314515), (85, 251612), (170, 125806), (340, 62903)]