20282080

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1$

素因数の和:241

約数の個数: 144

約数和(自身を含む): 60328800

約数和(自身を除く): 40046720

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 49, 52, 56, 65, 70, 80, 91, 98, 104, 112, 130, 140, 160, 182, 196, 199, 208, 224, 245, 260, 280, 364, 392, 398, 416, 455, 490, 520, 560, 637, 728, 784, 796, 910, 980, 995, 1040, 1120, 1274, 1393, 1456, 1568, 1592, 1820, 1960, 1990, 2080, 2548, 2587, 2786, 2912, 3184, 3185, 3640, 3920, 3980, 5096, 5174, 5572, 6368, 6370, 6965, 7280, 7840, 7960, 9751, 10192, 10348, 11144, 12740, 12935, 13930, 14560, 15920, 18109, 19502, 20384, 20696, 22288, 25480, 25870, 27860, 31840, 36218, 39004, 41392, 44576, 48755, 50960, 51740, 55720, 72436, 78008, 82784, 90545, 97510, 101920, 103480, 111440, 126763, 144872, 156016, 181090, 195020, 206960, 222880, 253526, 289744, 312032, 362180, 390040, 413920, 507052, 579488, 633815, 724360, 780080, 1014104, 1267630, 1448720, 1560160, 2028208, 2535260, 2897440, 4056416, 5070520, 10141040, 20282080]

約数ペア:

[(1, 20282080), (2, 10141040), (4, 5070520), (5, 4056416), (7, 2897440), (8, 2535260), (10, 2028208), (13, 1560160), (14, 1448720), (16, 1267630), (20, 1014104), (26, 780080), (28, 724360), (32, 633815), (35, 579488), (40, 507052), (49, 413920), (52, 390040), (56, 362180), (65, 312032), (70, 289744), (80, 253526), (91, 222880), (98, 206960), (104, 195020), (112, 181090), (130, 156016), (140, 144872), (160, 126763), (182, 111440), (196, 103480), (199, 101920), (208, 97510), (224, 90545), (245, 82784), (260, 78008), (280, 72436), (364, 55720), (392, 51740), (398, 50960), (416, 48755), (455, 44576), (490, 41392), (520, 39004), (560, 36218), (637, 31840), (728, 27860), (784, 25870), (796, 25480), (910, 22288), (980, 20696), (995, 20384), (1040, 19502), (1120, 18109), (1274, 15920), (1393, 14560), (1456, 13930), (1568, 12935), (1592, 12740), (1820, 11144), (1960, 10348), (1990, 10192), (2080, 9751), (2548, 7960), (2587, 7840), (2786, 7280), (2912, 6965), (3184, 6370), (3185, 6368), (3640, 5572), (3920, 5174), (3980, 5096)]