19499780

素因数分解:

$2^2\times 5^1\times {\mathrm{974989}}^1$

素因数の和:974998

約数の個数: 12

約数和(自身を含む): 40949580

約数和(自身を除く): 21449800

約数列:

[1, 2, 4, 5, 10, 20, 974989, 1949978, 3899956, 4874945, 9749890, 19499780]

約数ペア:

[(1, 19499780), (2, 9749890), (4, 4874945), (5, 3899956), (10, 1949978), (20, 974989)]