18538660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{18917}}^1$

素因数の和:18940

約数の個数: 36

約数和(自身を含む): 45289692

約数和(自身を除く): 26751032

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 18917, 37834, 75668, 94585, 132419, 189170, 264838, 378340, 529676, 662095, 926933, 1324190, 1853866, 2648380, 3707732, 4634665, 9269330, 18538660]

約数ペア:

[(1, 18538660), (2, 9269330), (4, 4634665), (5, 3707732), (7, 2648380), (10, 1853866), (14, 1324190), (20, 926933), (28, 662095), (35, 529676), (49, 378340), (70, 264838), (98, 189170), (140, 132419), (196, 94585), (245, 75668), (490, 37834), (980, 18917)]