21305241

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{103}}^1\times {\mathrm{163}}^1$

素因数の和:322

約数の個数: 32

約数和(自身を含む): 32747520

約数和(自身を除く): 11442279

約数列:

[1, 3, 9, 27, 47, 103, 141, 163, 309, 423, 489, 927, 1269, 1467, 2781, 4401, 4841, 7661, 14523, 16789, 22983, 43569, 50367, 68949, 130707, 151101, 206847, 453303, 789083, 2367249, 7101747, 21305241]

約数ペア:

[(1, 21305241), (3, 7101747), (9, 2367249), (27, 789083), (47, 453303), (103, 206847), (141, 151101), (163, 130707), (309, 68949), (423, 50367), (489, 43569), (927, 22983), (1269, 16789), (1467, 14523), (2781, 7661), (4401, 4841)]