19504720

素因数分解:

$2^4\times 5^1\times {\mathrm{243809}}^1$

素因数の和:243822

約数の個数: 20

約数和(自身を含む): 45348660

約数和(自身を除く): 25843940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243809, 487618, 975236, 1219045, 1950472, 2438090, 3900944, 4876180, 9752360, 19504720]

約数ペア:

[(1, 19504720), (2, 9752360), (4, 4876180), (5, 3900944), (8, 2438090), (10, 1950472), (16, 1219045), (20, 975236), (40, 487618), (80, 243809)]