20578725

素因数分解:

$3^3\times 5^2\times {\mathrm{43}}^1\times {\mathrm{709}}^1$

素因数の和:771

約数の個数: 48

約数和(自身を含む): 38737600

約数和(自身を除く): 18158875

約数列:

[1, 3, 5, 9, 15, 25, 27, 43, 45, 75, 129, 135, 215, 225, 387, 645, 675, 709, 1075, 1161, 1935, 2127, 3225, 3545, 5805, 6381, 9675, 10635, 17725, 19143, 29025, 30487, 31905, 53175, 91461, 95715, 152435, 159525, 274383, 457305, 478575, 762175, 823149, 1371915, 2286525, 4115745, 6859575, 20578725]

約数ペア:

[(1, 20578725), (3, 6859575), (5, 4115745), (9, 2286525), (15, 1371915), (25, 823149), (27, 762175), (43, 478575), (45, 457305), (75, 274383), (129, 159525), (135, 152435), (215, 95715), (225, 91461), (387, 53175), (645, 31905), (675, 30487), (709, 29025), (1075, 19143), (1161, 17725), (1935, 10635), (2127, 9675), (3225, 6381), (3545, 5805)]