12918800

素因数分解:

$2^4\times 5^2\times {\mathrm{32297}}^1$

素因数の和:32315

約数の個数: 30

約数和(自身を含む): 31038378

約数和(自身を除く): 18119578

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 32297, 64594, 129188, 161485, 258376, 322970, 516752, 645940, 807425, 1291880, 1614850, 2583760, 3229700, 6459400, 12918800]

約数ペア:

[(1, 12918800), (2, 6459400), (4, 3229700), (5, 2583760), (8, 1614850), (10, 1291880), (16, 807425), (20, 645940), (25, 516752), (40, 322970), (50, 258376), (80, 161485), (100, 129188), (200, 64594), (400, 32297)]