20702480

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1031}}^1$

素因数の和:1295

約数の個数: 40

約数和(自身を含む): 48371904

約数和(自身を除く): 27669424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1031, 1255, 2008, 2062, 2510, 4016, 4124, 5020, 5155, 8248, 10040, 10310, 16496, 20080, 20620, 41240, 82480, 258781, 517562, 1035124, 1293905, 2070248, 2587810, 4140496, 5175620, 10351240, 20702480]

約数ペア:

[(1, 20702480), (2, 10351240), (4, 5175620), (5, 4140496), (8, 2587810), (10, 2070248), (16, 1293905), (20, 1035124), (40, 517562), (80, 258781), (251, 82480), (502, 41240), (1004, 20620), (1031, 20080), (1255, 16496), (2008, 10310), (2062, 10040), (2510, 8248), (4016, 5155), (4124, 5020)]