21375717

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{28163}}^1$

素因数の和:28200

約数の個数: 16

約数和(自身を含む): 32444928

約数和(自身を除く): 11069211

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 28163, 84489, 309793, 647749, 929379, 1943247, 7125239, 21375717]

約数ペア:

[(1, 21375717), (3, 7125239), (11, 1943247), (23, 929379), (33, 647749), (69, 309793), (253, 84489), (759, 28163)]