18784720

素因数分解:

$2^4\times 5^1\times {\mathrm{234809}}^1$

素因数の和:234822

約数の個数: 20

約数和(自身を含む): 43674660

約数和(自身を除く): 24889940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 234809, 469618, 939236, 1174045, 1878472, 2348090, 3756944, 4696180, 9392360, 18784720]

約数ペア:

[(1, 18784720), (2, 9392360), (4, 4696180), (5, 3756944), (8, 2348090), (10, 1878472), (16, 1174045), (20, 939236), (40, 469618), (80, 234809)]