81250280

素因数分解:

$2^3\times 5^1\times {\mathrm{2031257}}^1$

素因数の和:2031268

約数の個数: 16

約数和(自身を含む): 182813220

約数和(自身を除く): 101562940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2031257, 4062514, 8125028, 10156285, 16250056, 20312570, 40625140, 81250280]

約数ペア:

[(1, 81250280), (2, 40625140), (4, 20312570), (5, 16250056), (8, 10156285), (10, 8125028), (20, 4062514), (40, 2031257)]