21656140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{569}}^1$

素因数の和:762

約数の個数: 48

約数和(自身を含む): 49986720

約数和(自身を除く): 28330580

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 173, 220, 346, 569, 692, 865, 1138, 1730, 1903, 2276, 2845, 3460, 3806, 5690, 6259, 7612, 9515, 11380, 12518, 19030, 25036, 31295, 38060, 62590, 98437, 125180, 196874, 393748, 492185, 984370, 1082807, 1968740, 2165614, 4331228, 5414035, 10828070, 21656140]

約数ペア:

[(1, 21656140), (2, 10828070), (4, 5414035), (5, 4331228), (10, 2165614), (11, 1968740), (20, 1082807), (22, 984370), (44, 492185), (55, 393748), (110, 196874), (173, 125180), (220, 98437), (346, 62590), (569, 38060), (692, 31295), (865, 25036), (1138, 19030), (1730, 12518), (1903, 11380), (2276, 9515), (2845, 7612), (3460, 6259), (3806, 5690)]