21019779

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{241}}^1\times {\mathrm{881}}^1$

素因数の和:1139

約数の個数: 24

約数和(自身を含む): 33297264

約数和(自身を除く): 12277485

約数列:

[1, 3, 9, 11, 33, 99, 241, 723, 881, 2169, 2643, 2651, 7929, 7953, 9691, 23859, 29073, 87219, 212321, 636963, 1910889, 2335531, 7006593, 21019779]

約数ペア:

[(1, 21019779), (3, 7006593), (9, 2335531), (11, 1910889), (33, 636963), (99, 212321), (241, 87219), (723, 29073), (881, 23859), (2169, 9691), (2643, 7953), (2651, 7929)]