20178189

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1$

素因数の和:489

約数の個数: 24

約数和(自身を含む): 29949920

約数和(自身を除く): 9771731

約数列:

[1, 3, 9, 67, 109, 201, 307, 327, 603, 921, 981, 2763, 7303, 20569, 21909, 33463, 61707, 65727, 100389, 185121, 301167, 2242021, 6726063, 20178189]

約数ペア:

[(1, 20178189), (3, 6726063), (9, 2242021), (67, 301167), (109, 185121), (201, 100389), (307, 65727), (327, 61707), (603, 33463), (921, 21909), (981, 20569), (2763, 7303)]