21276591

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:383

約数の個数: 32

約数和(自身を含む): 33707520

約数和(自身を除く): 12430929

約数列:

[1, 3, 7, 21, 37, 111, 139, 197, 259, 417, 591, 777, 973, 1379, 2919, 4137, 5143, 7289, 15429, 21867, 27383, 36001, 51023, 82149, 108003, 153069, 191681, 575043, 1013171, 3039513, 7092197, 21276591]

約数ペア:

[(1, 21276591), (3, 7092197), (7, 3039513), (21, 1013171), (37, 575043), (111, 191681), (139, 153069), (197, 108003), (259, 82149), (417, 51023), (591, 36001), (777, 27383), (973, 21867), (1379, 15429), (2919, 7289), (4137, 5143)]