81320210

素因数分解:

$2^1\times 5^1\times {\mathrm{643}}^1\times {\mathrm{12647}}^1$

素因数の和:13297

約数の個数: 16

約数和(自身を含む): 146615616

約数和(自身を除く): 65295406

約数列:

[1, 2, 5, 10, 643, 1286, 3215, 6430, 12647, 25294, 63235, 126470, 8132021, 16264042, 40660105, 81320210]

約数ペア:

[(1, 81320210), (2, 40660105), (5, 16264042), (10, 8132021), (643, 126470), (1286, 63235), (3215, 25294), (6430, 12647)]