638809920

素因数分解:

$2^6\times 3^2\times 5^1\times 7^1\times {\mathrm{31687}}^1$

素因数の和:31717

約数の個数: 168

約数和(自身を含む): 2511210624

約数和(自身を除く): 1872400704

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 280, 288, 315, 320, 336, 360, 420, 448, 480, 504, 560, 576, 630, 672, 720, 840, 960, 1008, 1120, 1260, 1344, 1440, 1680, 2016, 2240, 2520, 2880, 3360, 4032, 5040, 6720, 10080, 20160, 31687, 63374, 95061, 126748, 158435, 190122, 221809, 253496, 285183, 316870, 380244, 443618, 475305, 506992, 570366, 633740, 665427, 760488, 887236, 950610, 1013984, 1109045, 1140732, 1267480, 1330854, 1425915, 1520976, 1774472, 1901220, 1996281, 2027968, 2218090, 2281464, 2534960, 2661708, 2851830, 3041952, 3327135, 3548944, 3802440, 3992562, 4436180, 4562928, 5069920, 5323416, 5703660, 6083904, 6654270, 7097888, 7604880, 7985124, 8872360, 9125856, 9981405, 10139840, 10646832, 11407320, 13308540, 14195776, 15209760, 15970248, 17744720, 18251712, 19962810, 21293664, 22814640, 26617080, 30419520, 31940496, 35489440, 39925620, 42587328, 45629280, 53234160, 63880992, 70978880, 79851240, 91258560, 106468320, 127761984, 159702480, 212936640, 319404960, 638809920]

約数ペア:

[(1, 638809920), (2, 319404960), (3, 212936640), (4, 159702480), (5, 127761984), (6, 106468320), (7, 91258560), (8, 79851240), (9, 70978880), (10, 63880992), (12, 53234160), (14, 45629280), (15, 42587328), (16, 39925620), (18, 35489440), (20, 31940496), (21, 30419520), (24, 26617080), (28, 22814640), (30, 21293664), (32, 19962810), (35, 18251712), (36, 17744720), (40, 15970248), (42, 15209760), (45, 14195776), (48, 13308540), (56, 11407320), (60, 10646832), (63, 10139840), (64, 9981405), (70, 9125856), (72, 8872360), (80, 7985124), (84, 7604880), (90, 7097888), (96, 6654270), (105, 6083904), (112, 5703660), (120, 5323416), (126, 5069920), (140, 4562928), (144, 4436180), (160, 3992562), (168, 3802440), (180, 3548944), (192, 3327135), (210, 3041952), (224, 2851830), (240, 2661708), (252, 2534960), (280, 2281464), (288, 2218090), (315, 2027968), (320, 1996281), (336, 1901220), (360, 1774472), (420, 1520976), (448, 1425915), (480, 1330854), (504, 1267480), (560, 1140732), (576, 1109045), (630, 1013984), (672, 950610), (720, 887236), (840, 760488), (960, 665427), (1008, 633740), (1120, 570366), (1260, 506992), (1344, 475305), (1440, 443618), (1680, 380244), (2016, 316870), (2240, 285183), (2520, 253496), (2880, 221809), (3360, 190122), (4032, 158435), (5040, 126748), (6720, 95061), (10080, 63374), (20160, 31687)]