20727680

素因数分解:

$2^7\times 5^1\times {\mathrm{139}}^1\times {\mathrm{233}}^1$

素因数の和:391

約数の個数: 64

約数和(自身を含む): 50122800

約数和(自身を除く): 29395120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 139, 160, 233, 278, 320, 466, 556, 640, 695, 932, 1112, 1165, 1390, 1864, 2224, 2330, 2780, 3728, 4448, 4660, 5560, 7456, 8896, 9320, 11120, 14912, 17792, 18640, 22240, 29824, 32387, 37280, 44480, 64774, 74560, 88960, 129548, 149120, 161935, 259096, 323870, 518192, 647740, 1036384, 1295480, 2072768, 2590960, 4145536, 5181920, 10363840, 20727680]

約数ペア:

[(1, 20727680), (2, 10363840), (4, 5181920), (5, 4145536), (8, 2590960), (10, 2072768), (16, 1295480), (20, 1036384), (32, 647740), (40, 518192), (64, 323870), (80, 259096), (128, 161935), (139, 149120), (160, 129548), (233, 88960), (278, 74560), (320, 64774), (466, 44480), (556, 37280), (640, 32387), (695, 29824), (932, 22240), (1112, 18640), (1165, 17792), (1390, 14912), (1864, 11120), (2224, 9320), (2330, 8896), (2780, 7456), (3728, 5560), (4448, 4660)]