217801520

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{13681}}^1$

素因数の和:13893

約数の個数: 40

約数和(自身を含む): 508970400

約数和(自身を除く): 291168880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1592, 1990, 3184, 3980, 7960, 13681, 15920, 27362, 54724, 68405, 109448, 136810, 218896, 273620, 547240, 1094480, 2722519, 5445038, 10890076, 13612595, 21780152, 27225190, 43560304, 54450380, 108900760, 217801520]

約数ペア:

[(1, 217801520), (2, 108900760), (4, 54450380), (5, 43560304), (8, 27225190), (10, 21780152), (16, 13612595), (20, 10890076), (40, 5445038), (80, 2722519), (199, 1094480), (398, 547240), (796, 273620), (995, 218896), (1592, 136810), (1990, 109448), (3184, 68405), (3980, 54724), (7960, 27362), (13681, 15920)]