20451480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{251}}^1$

素因数の和:369

約数の個数: 128

約数和(自身を含む): 71124480

約数和(自身を除く): 50673000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 97, 105, 120, 140, 168, 194, 210, 251, 280, 291, 388, 420, 485, 502, 582, 679, 753, 776, 840, 970, 1004, 1164, 1255, 1358, 1455, 1506, 1757, 1940, 2008, 2037, 2328, 2510, 2716, 2910, 3012, 3395, 3514, 3765, 3880, 4074, 5020, 5271, 5432, 5820, 6024, 6790, 7028, 7530, 8148, 8785, 10040, 10185, 10542, 11640, 13580, 14056, 15060, 16296, 17570, 20370, 21084, 24347, 26355, 27160, 30120, 35140, 40740, 42168, 48694, 52710, 70280, 73041, 81480, 97388, 105420, 121735, 146082, 170429, 194776, 210840, 243470, 292164, 340858, 365205, 486940, 511287, 584328, 681716, 730410, 852145, 973880, 1022574, 1363432, 1460820, 1704290, 2045148, 2556435, 2921640, 3408580, 4090296, 5112870, 6817160, 10225740, 20451480]

約数ペア:

[(1, 20451480), (2, 10225740), (3, 6817160), (4, 5112870), (5, 4090296), (6, 3408580), (7, 2921640), (8, 2556435), (10, 2045148), (12, 1704290), (14, 1460820), (15, 1363432), (20, 1022574), (21, 973880), (24, 852145), (28, 730410), (30, 681716), (35, 584328), (40, 511287), (42, 486940), (56, 365205), (60, 340858), (70, 292164), (84, 243470), (97, 210840), (105, 194776), (120, 170429), (140, 146082), (168, 121735), (194, 105420), (210, 97388), (251, 81480), (280, 73041), (291, 70280), (388, 52710), (420, 48694), (485, 42168), (502, 40740), (582, 35140), (679, 30120), (753, 27160), (776, 26355), (840, 24347), (970, 21084), (1004, 20370), (1164, 17570), (1255, 16296), (1358, 15060), (1455, 14056), (1506, 13580), (1757, 11640), (1940, 10542), (2008, 10185), (2037, 10040), (2328, 8785), (2510, 8148), (2716, 7530), (2910, 7028), (3012, 6790), (3395, 6024), (3514, 5820), (3765, 5432), (3880, 5271), (4074, 5020)]