81223840

素因数分解:

$2^5\times 5^1\times {\mathrm{199}}^1\times {\mathrm{2551}}^1$

素因数の和:2765

約数の個数: 48

約数和(自身を含む): 192931200

約数和(自身を除く): 111707360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 199, 398, 796, 995, 1592, 1990, 2551, 3184, 3980, 5102, 6368, 7960, 10204, 12755, 15920, 20408, 25510, 31840, 40816, 51020, 81632, 102040, 204080, 408160, 507649, 1015298, 2030596, 2538245, 4061192, 5076490, 8122384, 10152980, 16244768, 20305960, 40611920, 81223840]

約数ペア:

[(1, 81223840), (2, 40611920), (4, 20305960), (5, 16244768), (8, 10152980), (10, 8122384), (16, 5076490), (20, 4061192), (32, 2538245), (40, 2030596), (80, 1015298), (160, 507649), (199, 408160), (398, 204080), (796, 102040), (995, 81632), (1592, 51020), (1990, 40816), (2551, 31840), (3184, 25510), (3980, 20408), (5102, 15920), (6368, 12755), (7960, 10204)]