1658740

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{421}}^1$

素因数の和:627

約数の個数: 24

約数和(自身を含む): 3509352

約数和(自身を除く): 1850612

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 421, 788, 842, 985, 1684, 1970, 2105, 3940, 4210, 8420, 82937, 165874, 331748, 414685, 829370, 1658740]

約数ペア:

[(1, 1658740), (2, 829370), (4, 414685), (5, 331748), (10, 165874), (20, 82937), (197, 8420), (394, 4210), (421, 3940), (788, 2105), (842, 1970), (985, 1684)]