18801520

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1181}}^1$

素因数の和:1393

約数の個数: 40

約数和(自身を含む): 43970400

約数和(自身を除く): 25168880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1181, 1592, 1990, 2362, 3184, 3980, 4724, 5905, 7960, 9448, 11810, 15920, 18896, 23620, 47240, 94480, 235019, 470038, 940076, 1175095, 1880152, 2350190, 3760304, 4700380, 9400760, 18801520]

約数ペア:

[(1, 18801520), (2, 9400760), (4, 4700380), (5, 3760304), (8, 2350190), (10, 1880152), (16, 1175095), (20, 940076), (40, 470038), (80, 235019), (199, 94480), (398, 47240), (796, 23620), (995, 18896), (1181, 15920), (1592, 11810), (1990, 9448), (2362, 7960), (3184, 5905), (3980, 4724)]