21251295

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{12109}}^1$

素因数の和:12136

約数の個数: 32

約数和(自身を含む): 40689600

約数和(自身を除く): 19438305

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 117, 135, 195, 351, 585, 1755, 12109, 36327, 60545, 108981, 157417, 181635, 326943, 472251, 544905, 787085, 1416753, 1634715, 2361255, 4250259, 7083765, 21251295]

約数ペア:

[(1, 21251295), (3, 7083765), (5, 4250259), (9, 2361255), (13, 1634715), (15, 1416753), (27, 787085), (39, 544905), (45, 472251), (65, 326943), (117, 181635), (135, 157417), (195, 108981), (351, 60545), (585, 36327), (1755, 12109)]