20666020

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1607}}^1$

素因数の和:2259

約数の個数: 24

約数和(自身を含む): 43493184

約数和(自身を除く): 22827164

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1607, 2572, 3214, 3215, 6428, 6430, 8035, 12860, 16070, 32140, 1033301, 2066602, 4133204, 5166505, 10333010, 20666020]

約数ペア:

[(1, 20666020), (2, 10333010), (4, 5166505), (5, 4133204), (10, 2066602), (20, 1033301), (643, 32140), (1286, 16070), (1607, 12860), (2572, 8035), (3214, 6430), (3215, 6428)]