78819920

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{4951}}^1$

素因数の和:5163

約数の個数: 40

約数和(自身を含む): 184214400

約数和(自身を除く): 105394480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1592, 1990, 3184, 3980, 4951, 7960, 9902, 15920, 19804, 24755, 39608, 49510, 79216, 99020, 198040, 396080, 985249, 1970498, 3940996, 4926245, 7881992, 9852490, 15763984, 19704980, 39409960, 78819920]

約数ペア:

[(1, 78819920), (2, 39409960), (4, 19704980), (5, 15763984), (8, 9852490), (10, 7881992), (16, 4926245), (20, 3940996), (40, 1970498), (80, 985249), (199, 396080), (398, 198040), (796, 99020), (995, 79216), (1592, 49510), (1990, 39608), (3184, 24755), (3980, 19804), (4951, 15920), (7960, 9902)]