21928455

素因数分解:

$3^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1279}}^1$

素因数の和:1420

約数の個数: 32

約数和(自身を含む): 39321600

約数和(自身を除く): 17393145

約数列:

[1, 3, 5, 9, 15, 27, 45, 127, 135, 381, 635, 1143, 1279, 1905, 3429, 3837, 5715, 6395, 11511, 17145, 19185, 34533, 57555, 162433, 172665, 487299, 812165, 1461897, 2436495, 4385691, 7309485, 21928455]

約数ペア:

[(1, 21928455), (3, 7309485), (5, 4385691), (9, 2436495), (15, 1461897), (27, 812165), (45, 487299), (127, 172665), (135, 162433), (381, 57555), (635, 34533), (1143, 19185), (1279, 17145), (1905, 11511), (3429, 6395), (3837, 5715)]