20405217

素因数分解:

$3^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{1093}}^1$

素因数の和:1237

約数の個数: 24

約数和(自身を含む): 31927296

約数和(自身を除く): 11522079

約数列:

[1, 3, 7, 21, 49, 127, 147, 381, 889, 1093, 2667, 3279, 6223, 7651, 18669, 22953, 53557, 138811, 160671, 416433, 971677, 2915031, 6801739, 20405217]

約数ペア:

[(1, 20405217), (3, 6801739), (7, 2915031), (21, 971677), (49, 416433), (127, 160671), (147, 138811), (381, 53557), (889, 22953), (1093, 18669), (2667, 7651), (3279, 6223)]