20431887

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1\times {\mathrm{163}}^1$

素因数の和:347

約数の個数: 32

約数和(自身を含む): 32243712

約数和(自身を除く): 11811825

約数列:

[1, 3, 7, 21, 47, 127, 141, 163, 329, 381, 489, 889, 987, 1141, 2667, 3423, 5969, 7661, 17907, 20701, 22983, 41783, 53627, 62103, 125349, 144907, 160881, 434721, 972947, 2918841, 6810629, 20431887]

約数ペア:

[(1, 20431887), (3, 6810629), (7, 2918841), (21, 972947), (47, 434721), (127, 160881), (141, 144907), (163, 125349), (329, 62103), (381, 53627), (489, 41783), (889, 22983), (987, 20701), (1141, 17907), (2667, 7661), (3423, 5969)]