18972891

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{4937}}^1$

素因数の和:5011

約数の個数: 24

約数和(自身を含む): 31840224

約数和(自身を除く): 12867333

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 4937, 14811, 34559, 44433, 103677, 301157, 311031, 903471, 2108099, 2710413, 6324297, 18972891]

約数ペア:

[(1, 18972891), (3, 6324297), (7, 2710413), (9, 2108099), (21, 903471), (61, 311031), (63, 301157), (183, 103677), (427, 44433), (549, 34559), (1281, 14811), (3843, 4937)]