19909940

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9133}}^1$

素因数の和:9251

約数の個数: 24

約数和(自身を含む): 42199080

約数和(自身を除く): 22289140

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9133, 18266, 36532, 45665, 91330, 182660, 995497, 1990994, 3981988, 4977485, 9954970, 19909940]

約数ペア:

[(1, 19909940), (2, 9954970), (4, 4977485), (5, 3981988), (10, 1990994), (20, 995497), (109, 182660), (218, 91330), (436, 45665), (545, 36532), (1090, 18266), (2180, 9133)]