21786520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1$

素因数の和:257

約数の個数: 128

約数和(自身を含む): 62208000

約数和(自身を除く): 40421480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 23, 28, 34, 35, 40, 46, 56, 68, 70, 85, 92, 115, 119, 136, 140, 161, 170, 184, 199, 230, 238, 280, 322, 340, 391, 398, 460, 476, 595, 644, 680, 782, 796, 805, 920, 952, 995, 1190, 1288, 1393, 1564, 1592, 1610, 1955, 1990, 2380, 2737, 2786, 3128, 3220, 3383, 3910, 3980, 4577, 4760, 5474, 5572, 6440, 6766, 6965, 7820, 7960, 9154, 10948, 11144, 13532, 13685, 13930, 15640, 16915, 18308, 21896, 22885, 23681, 27064, 27370, 27860, 32039, 33830, 36616, 45770, 47362, 54740, 55720, 64078, 67660, 77809, 91540, 94724, 109480, 118405, 128156, 135320, 155618, 160195, 183080, 189448, 236810, 256312, 311236, 320390, 389045, 473620, 544663, 622472, 640780, 778090, 947240, 1089326, 1281560, 1556180, 2178652, 2723315, 3112360, 4357304, 5446630, 10893260, 21786520]

約数ペア:

[(1, 21786520), (2, 10893260), (4, 5446630), (5, 4357304), (7, 3112360), (8, 2723315), (10, 2178652), (14, 1556180), (17, 1281560), (20, 1089326), (23, 947240), (28, 778090), (34, 640780), (35, 622472), (40, 544663), (46, 473620), (56, 389045), (68, 320390), (70, 311236), (85, 256312), (92, 236810), (115, 189448), (119, 183080), (136, 160195), (140, 155618), (161, 135320), (170, 128156), (184, 118405), (199, 109480), (230, 94724), (238, 91540), (280, 77809), (322, 67660), (340, 64078), (391, 55720), (398, 54740), (460, 47362), (476, 45770), (595, 36616), (644, 33830), (680, 32039), (782, 27860), (796, 27370), (805, 27064), (920, 23681), (952, 22885), (995, 21896), (1190, 18308), (1288, 16915), (1393, 15640), (1564, 13930), (1592, 13685), (1610, 13532), (1955, 11144), (1990, 10948), (2380, 9154), (2737, 7960), (2786, 7820), (3128, 6965), (3220, 6766), (3383, 6440), (3910, 5572), (3980, 5474), (4577, 4760)]