1281560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 3456000

約数和(自身を除く): 2174440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 199, 230, 280, 322, 398, 460, 644, 796, 805, 920, 995, 1288, 1393, 1592, 1610, 1990, 2786, 3220, 3980, 4577, 5572, 6440, 6965, 7960, 9154, 11144, 13930, 18308, 22885, 27860, 32039, 36616, 45770, 55720, 64078, 91540, 128156, 160195, 183080, 256312, 320390, 640780, 1281560]

約数ペア:

[(1, 1281560), (2, 640780), (4, 320390), (5, 256312), (7, 183080), (8, 160195), (10, 128156), (14, 91540), (20, 64078), (23, 55720), (28, 45770), (35, 36616), (40, 32039), (46, 27860), (56, 22885), (70, 18308), (92, 13930), (115, 11144), (140, 9154), (161, 7960), (184, 6965), (199, 6440), (230, 5572), (280, 4577), (322, 3980), (398, 3220), (460, 2786), (644, 1990), (796, 1610), (805, 1592), (920, 1393), (995, 1288)]