20978158

素因数分解:

$2^1\times {\mathrm{59}}^1\times {\mathrm{139}}^1\times {\mathrm{1279}}^1$

素因数の和:1479

約数の個数: 16

約数和(自身を含む): 32256000

約数和(自身を除く): 11277842

約数列:

[1, 2, 59, 118, 139, 278, 1279, 2558, 8201, 16402, 75461, 150922, 177781, 355562, 10489079, 20978158]

約数ペア:

[(1, 20978158), (2, 10489079), (59, 355562), (118, 177781), (139, 150922), (278, 75461), (1279, 16402), (2558, 8201)]