20381949

素因数分解:

$3^4\times 7^1\times {\mathrm{103}}^1\times {\mathrm{349}}^1$

素因数の和:471

約数の個数: 40

約数和(自身を含む): 35235200

約数和(自身を除く): 14853251

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 103, 189, 309, 349, 567, 721, 927, 1047, 2163, 2443, 2781, 3141, 6489, 7329, 8343, 9423, 19467, 21987, 28269, 35947, 58401, 65961, 107841, 197883, 251629, 323523, 754887, 970569, 2264661, 2911707, 6793983, 20381949]

約数ペア:

[(1, 20381949), (3, 6793983), (7, 2911707), (9, 2264661), (21, 970569), (27, 754887), (63, 323523), (81, 251629), (103, 197883), (189, 107841), (309, 65961), (349, 58401), (567, 35947), (721, 28269), (927, 21987), (1047, 19467), (2163, 9423), (2443, 8343), (2781, 7329), (3141, 6489)]