806980

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{257}}^1$

素因数の和:423

約数の個数: 24

約数和(自身を含む): 1712088

約数和(自身を除く): 905108

約数列:

[1, 2, 4, 5, 10, 20, 157, 257, 314, 514, 628, 785, 1028, 1285, 1570, 2570, 3140, 5140, 40349, 80698, 161396, 201745, 403490, 806980]

約数ペア:

[(1, 806980), (2, 403490), (4, 201745), (5, 161396), (10, 80698), (20, 40349), (157, 5140), (257, 3140), (314, 2570), (514, 1570), (628, 1285), (785, 1028)]