8419780

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2137}}^1$

素因数の和:2343

約数の個数: 24

約数和(自身を含む): 17779608

約数和(自身を除く): 9359828

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 2137, 3940, 4274, 8548, 10685, 21370, 42740, 420989, 841978, 1683956, 2104945, 4209890, 8419780]

約数ペア:

[(1, 8419780), (2, 4209890), (4, 2104945), (5, 1683956), (10, 841978), (20, 420989), (197, 42740), (394, 21370), (788, 10685), (985, 8548), (1970, 4274), (2137, 3940)]