81988165

素因数分解:

$5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{21491}}^1$

素因数の和:21612

約数の個数: 16

約数和(自身を含む): 113477760

約数和(自身を除く): 31489595

約数列:

[1, 5, 7, 35, 109, 545, 763, 3815, 21491, 107455, 150437, 752185, 2342519, 11712595, 16397633, 81988165]

約数ペア:

[(1, 81988165), (5, 16397633), (7, 11712595), (35, 2342519), (109, 752185), (545, 150437), (763, 107455), (3815, 21491)]