21247745

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{2531}}^1$

素因数の和:2632

約数の個数: 16

約数和(自身を含む): 26980992

約数和(自身を除く): 5733247

約数列:

[1, 5, 23, 73, 115, 365, 1679, 2531, 8395, 12655, 58213, 184763, 291065, 923815, 4249549, 21247745]

約数ペア:

[(1, 21247745), (5, 4249549), (23, 923815), (73, 291065), (115, 184763), (365, 58213), (1679, 12655), (2531, 8395)]