18756829

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 24442880

約数和(自身を除く): 5686051

約数列:

[1, 7, 13, 31, 61, 91, 109, 217, 403, 427, 763, 793, 1417, 1891, 2821, 3379, 5551, 6649, 9919, 13237, 23653, 24583, 43927, 46543, 86437, 172081, 206119, 307489, 605059, 1442833, 2679547, 18756829]

約数ペア:

[(1, 18756829), (7, 2679547), (13, 1442833), (31, 605059), (61, 307489), (91, 206119), (109, 172081), (217, 86437), (403, 46543), (427, 43927), (763, 24583), (793, 23653), (1417, 13237), (1891, 9919), (2821, 6649), (3379, 5551)]