20508717284

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{647}}^1\times {\mathrm{720413}}^1$

素因数の和:721075

約数の個数: 24

約数和(自身を含む): 39213574848

約数和(自身を除く): 18704857564

約数列:

[1, 2, 4, 11, 22, 44, 647, 1294, 2588, 7117, 14234, 28468, 720413, 1440826, 2881652, 7924543, 15849086, 31698172, 466107211, 932214422, 1864428844, 5127179321, 10254358642, 20508717284]

約数ペア:

[(1, 20508717284), (2, 10254358642), (4, 5127179321), (11, 1864428844), (22, 932214422), (44, 466107211), (647, 31698172), (1294, 15849086), (2588, 7924543), (7117, 2881652), (14234, 1440826), (28468, 720413)]