81257210

素因数分解:

$2^1\times 5^1\times {\mathrm{421}}^1\times {\mathrm{19301}}^1$

素因数の和:19729

約数の個数: 16

約数和(自身を含む): 146617992

約数和(自身を除く): 65360782

約数列:

[1, 2, 5, 10, 421, 842, 2105, 4210, 19301, 38602, 96505, 193010, 8125721, 16251442, 40628605, 81257210]

約数ペア:

[(1, 81257210), (2, 40628605), (5, 16251442), (10, 8125721), (421, 193010), (842, 96505), (2105, 38602), (4210, 19301)]