20808767

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{307}}^1\times {\mathrm{421}}^1$

素因数の和:758

約数の個数: 16

約数和(自身を含む): 24955392

約数和(自身を除く): 4146625

約数列:

[1, 7, 23, 161, 307, 421, 2149, 2947, 7061, 9683, 49427, 67781, 129247, 904729, 2972681, 20808767]

約数ペア:

[(1, 20808767), (7, 2972681), (23, 904729), (161, 129247), (307, 67781), (421, 49427), (2149, 9683), (2947, 7061)]