20990256

素因数分解:

$2^4\times 3^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{349}}^1$

素因数の和:546

約数の個数: 80

約数和(自身を含む): 62496000

約数和(自身を除く): 41505744

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 42, 48, 56, 84, 112, 168, 179, 336, 349, 358, 537, 698, 716, 1047, 1074, 1253, 1396, 1432, 2094, 2148, 2443, 2506, 2792, 2864, 3759, 4188, 4296, 4886, 5012, 5584, 7329, 7518, 8376, 8592, 9772, 10024, 14658, 15036, 16752, 19544, 20048, 29316, 30072, 39088, 58632, 60144, 62471, 117264, 124942, 187413, 249884, 374826, 437297, 499768, 749652, 874594, 999536, 1311891, 1499304, 1749188, 2623782, 2998608, 3498376, 5247564, 6996752, 10495128, 20990256]

約数ペア:

[(1, 20990256), (2, 10495128), (3, 6996752), (4, 5247564), (6, 3498376), (7, 2998608), (8, 2623782), (12, 1749188), (14, 1499304), (16, 1311891), (21, 999536), (24, 874594), (28, 749652), (42, 499768), (48, 437297), (56, 374826), (84, 249884), (112, 187413), (168, 124942), (179, 117264), (336, 62471), (349, 60144), (358, 58632), (537, 39088), (698, 30072), (716, 29316), (1047, 20048), (1074, 19544), (1253, 16752), (1396, 15036), (1432, 14658), (2094, 10024), (2148, 9772), (2443, 8592), (2506, 8376), (2792, 7518), (2864, 7329), (3759, 5584), (4188, 5012), (4296, 4886)]