21907753

素因数分解:

$7^3\times {\mathrm{23}}^1\times {\mathrm{2777}}^1$

素因数の和:2821

約数の個数: 16

約数和(自身を含む): 26668800

約数和(自身を除く): 4761047

約数列:

[1, 7, 23, 49, 161, 343, 1127, 2777, 7889, 19439, 63871, 136073, 447097, 952511, 3129679, 21907753]

約数ペア:

[(1, 21907753), (7, 3129679), (23, 952511), (49, 447097), (161, 136073), (343, 63871), (1127, 19439), (2777, 7889)]