20187855

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10433}}^1$

素因数の和:10487

約数の個数: 24

約数和(自身を含む): 35809488

約数和(自身を除く): 15621633

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10433, 31299, 52165, 93897, 156495, 448619, 469485, 1345857, 2243095, 4037571, 6729285, 20187855]

約数ペア:

[(1, 20187855), (3, 6729285), (5, 4037571), (9, 2243095), (15, 1345857), (43, 469485), (45, 448619), (129, 156495), (215, 93897), (387, 52165), (645, 31299), (1935, 10433)]