20504960

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1$

素因数の和:248

約数の個数: 128

約数和(自身を含む): 58752000

約数和(自身を除く): 38247040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 64, 70, 80, 92, 112, 115, 128, 140, 160, 161, 184, 199, 224, 230, 280, 320, 322, 368, 398, 448, 460, 560, 640, 644, 736, 796, 805, 896, 920, 995, 1120, 1288, 1393, 1472, 1592, 1610, 1840, 1990, 2240, 2576, 2786, 2944, 3184, 3220, 3680, 3980, 4480, 4577, 5152, 5572, 6368, 6440, 6965, 7360, 7960, 9154, 10304, 11144, 12736, 12880, 13930, 14720, 15920, 18308, 20608, 22288, 22885, 25472, 25760, 27860, 31840, 32039, 36616, 44576, 45770, 51520, 55720, 63680, 64078, 73232, 89152, 91540, 103040, 111440, 127360, 128156, 146464, 160195, 178304, 183080, 222880, 256312, 292928, 320390, 366160, 445760, 512624, 585856, 640780, 732320, 891520, 1025248, 1281560, 1464640, 2050496, 2563120, 2929280, 4100992, 5126240, 10252480, 20504960]

約数ペア:

[(1, 20504960), (2, 10252480), (4, 5126240), (5, 4100992), (7, 2929280), (8, 2563120), (10, 2050496), (14, 1464640), (16, 1281560), (20, 1025248), (23, 891520), (28, 732320), (32, 640780), (35, 585856), (40, 512624), (46, 445760), (56, 366160), (64, 320390), (70, 292928), (80, 256312), (92, 222880), (112, 183080), (115, 178304), (128, 160195), (140, 146464), (160, 128156), (161, 127360), (184, 111440), (199, 103040), (224, 91540), (230, 89152), (280, 73232), (320, 64078), (322, 63680), (368, 55720), (398, 51520), (448, 45770), (460, 44576), (560, 36616), (640, 32039), (644, 31840), (736, 27860), (796, 25760), (805, 25472), (896, 22885), (920, 22288), (995, 20608), (1120, 18308), (1288, 15920), (1393, 14720), (1472, 13930), (1592, 12880), (1610, 12736), (1840, 11144), (1990, 10304), (2240, 9154), (2576, 7960), (2786, 7360), (2944, 6965), (3184, 6440), (3220, 6368), (3680, 5572), (3980, 5152), (4480, 4577)]