81384640

素因数分解:

$2^6\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1291}}^1$

素因数の和:1505

約数の個数: 56

約数和(自身を含む): 194931792

約数和(自身を除く): 113547152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 197, 320, 394, 788, 985, 1291, 1576, 1970, 2582, 3152, 3940, 5164, 6304, 6455, 7880, 10328, 12608, 12910, 15760, 20656, 25820, 31520, 41312, 51640, 63040, 82624, 103280, 206560, 254327, 413120, 508654, 1017308, 1271635, 2034616, 2543270, 4069232, 5086540, 8138464, 10173080, 16276928, 20346160, 40692320, 81384640]

約数ペア:

[(1, 81384640), (2, 40692320), (4, 20346160), (5, 16276928), (8, 10173080), (10, 8138464), (16, 5086540), (20, 4069232), (32, 2543270), (40, 2034616), (64, 1271635), (80, 1017308), (160, 508654), (197, 413120), (320, 254327), (394, 206560), (788, 103280), (985, 82624), (1291, 63040), (1576, 51640), (1970, 41312), (2582, 31520), (3152, 25820), (3940, 20656), (5164, 15760), (6304, 12910), (6455, 12608), (7880, 10328)]