78450280

素因数分解:

$2^3\times 5^1\times {\mathrm{1961257}}^1$

素因数の和:1961268

約数の個数: 16

約数和(自身を含む): 176513220

約数和(自身を除く): 98062940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1961257, 3922514, 7845028, 9806285, 15690056, 19612570, 39225140, 78450280]

約数ペア:

[(1, 78450280), (2, 39225140), (4, 19612570), (5, 15690056), (8, 9806285), (10, 7845028), (20, 3922514), (40, 1961257)]