18918800

素因数分解:

$2^4\times 5^2\times {\mathrm{47297}}^1$

素因数の和:47315

約数の個数: 30

約数和(自身を含む): 45453378

約数和(自身を除く): 26534578

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 47297, 94594, 189188, 236485, 378376, 472970, 756752, 945940, 1182425, 1891880, 2364850, 3783760, 4729700, 9459400, 18918800]

約数ペア:

[(1, 18918800), (2, 9459400), (4, 4729700), (5, 3783760), (8, 2364850), (10, 1891880), (16, 1182425), (20, 945940), (25, 756752), (40, 472970), (50, 378376), (80, 236485), (100, 189188), (200, 94594), (400, 47297)]