18451280

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1$

素因数の和:292

約数の個数: 80

約数和(自身を含む): 46128000

約数和(自身を除く): 27676720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 61, 76, 80, 95, 122, 152, 190, 199, 244, 304, 305, 380, 398, 488, 610, 760, 796, 976, 995, 1159, 1220, 1520, 1592, 1990, 2318, 2440, 3184, 3781, 3980, 4636, 4880, 5795, 7562, 7960, 9272, 11590, 12139, 15124, 15920, 18544, 18905, 23180, 24278, 30248, 37810, 46360, 48556, 60496, 60695, 75620, 92720, 97112, 121390, 151240, 194224, 230641, 242780, 302480, 461282, 485560, 922564, 971120, 1153205, 1845128, 2306410, 3690256, 4612820, 9225640, 18451280]

約数ペア:

[(1, 18451280), (2, 9225640), (4, 4612820), (5, 3690256), (8, 2306410), (10, 1845128), (16, 1153205), (19, 971120), (20, 922564), (38, 485560), (40, 461282), (61, 302480), (76, 242780), (80, 230641), (95, 194224), (122, 151240), (152, 121390), (190, 97112), (199, 92720), (244, 75620), (304, 60695), (305, 60496), (380, 48556), (398, 46360), (488, 37810), (610, 30248), (760, 24278), (796, 23180), (976, 18905), (995, 18544), (1159, 15920), (1220, 15124), (1520, 12139), (1592, 11590), (1990, 9272), (2318, 7960), (2440, 7562), (3184, 5795), (3781, 4880), (3980, 4636)]