21282075

素因数分解:

$3^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{769}}^1$

素因数の和:829

約数の個数: 48

約数和(自身を含む): 40101600

約数和(自身を除く): 18819525

約数列:

[1, 3, 5, 9, 15, 25, 27, 41, 45, 75, 123, 135, 205, 225, 369, 615, 675, 769, 1025, 1107, 1845, 2307, 3075, 3845, 5535, 6921, 9225, 11535, 19225, 20763, 27675, 31529, 34605, 57675, 94587, 103815, 157645, 173025, 283761, 472935, 519075, 788225, 851283, 1418805, 2364675, 4256415, 7094025, 21282075]

約数ペア:

[(1, 21282075), (3, 7094025), (5, 4256415), (9, 2364675), (15, 1418805), (25, 851283), (27, 788225), (41, 519075), (45, 472935), (75, 283761), (123, 173025), (135, 157645), (205, 103815), (225, 94587), (369, 57675), (615, 34605), (675, 31529), (769, 27675), (1025, 20763), (1107, 19225), (1845, 11535), (2307, 9225), (3075, 6921), (3845, 5535)]