18678820

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{6719}}^1$

素因数の和:6867

約数の個数: 24

約数和(自身を含む): 39513600

約数和(自身を除く): 20834780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 6719, 13438, 26876, 33595, 67190, 134380, 933941, 1867882, 3735764, 4669705, 9339410, 18678820]

約数ペア:

[(1, 18678820), (2, 9339410), (4, 4669705), (5, 3735764), (10, 1867882), (20, 933941), (139, 134380), (278, 67190), (556, 33595), (695, 26876), (1390, 13438), (2780, 6719)]