20647473

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{113}}^2$

素因数の和:254

約数の個数: 36

約数和(自身を含む): 35247888

約数和(自身を除く): 14600415

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 113, 147, 231, 339, 539, 791, 1243, 1617, 2373, 3729, 5537, 8701, 12769, 16611, 26103, 38307, 60907, 89383, 140459, 182721, 268149, 421377, 625681, 983213, 1877043, 2949639, 6882491, 20647473]

約数ペア:

[(1, 20647473), (3, 6882491), (7, 2949639), (11, 1877043), (21, 983213), (33, 625681), (49, 421377), (77, 268149), (113, 182721), (147, 140459), (231, 89383), (339, 60907), (539, 38307), (791, 26103), (1243, 16611), (1617, 12769), (2373, 8701), (3729, 5537)]