18400820

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{6619}}^1$

素因数の和:6767

約数の個数: 24

約数和(自身を含む): 38925600

約数和(自身を除く): 20524780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 6619, 13238, 26476, 33095, 66190, 132380, 920041, 1840082, 3680164, 4600205, 9200410, 18400820]

約数ペア:

[(1, 18400820), (2, 9200410), (4, 4600205), (5, 3680164), (10, 1840082), (20, 920041), (139, 132380), (278, 66190), (556, 33095), (695, 26476), (1390, 13238), (2780, 6619)]