21989495

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{17383}}^1$

素因数の和:17422

約数の個数: 16

約数和(自身を含む): 30039552

約数和(自身を除く): 8050057

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 17383, 86915, 191213, 399809, 956065, 1999045, 4397899, 21989495]

約数ペア:

[(1, 21989495), (5, 4397899), (11, 1999045), (23, 956065), (55, 399809), (115, 191213), (253, 86915), (1265, 17383)]