20405980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{145757}}^1$

素因数の和:145773

約数の個数: 24

約数和(自身を含む): 48974688

約数和(自身を除く): 28568708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 145757, 291514, 583028, 728785, 1020299, 1457570, 2040598, 2915140, 4081196, 5101495, 10202990, 20405980]

約数ペア:

[(1, 20405980), (2, 10202990), (4, 5101495), (5, 4081196), (7, 2915140), (10, 2040598), (14, 1457570), (20, 1020299), (28, 728785), (35, 583028), (70, 291514), (140, 145757)]