78938800

素因数分解:

$2^4\times 5^2\times {\mathrm{197347}}^1$

素因数の和:197365

約数の個数: 30

約数和(自身を含む): 189651428

約数和(自身を除く): 110712628

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 197347, 394694, 789388, 986735, 1578776, 1973470, 3157552, 3946940, 4933675, 7893880, 9867350, 15787760, 19734700, 39469400, 78938800]

約数ペア:

[(1, 78938800), (2, 39469400), (4, 19734700), (5, 15787760), (8, 9867350), (10, 7893880), (16, 4933675), (20, 3946940), (25, 3157552), (40, 1973470), (50, 1578776), (80, 986735), (100, 789388), (200, 394694), (400, 197347)]