21045563

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:227

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 6533317

約数列:

[1, 7, 11, 37, 77, 83, 89, 259, 407, 581, 623, 913, 979, 2849, 3071, 3293, 6391, 6853, 7387, 21497, 23051, 33781, 36223, 51709, 81257, 236467, 253561, 273319, 568799, 1913233, 3006509, 21045563]

約数ペア:

[(1, 21045563), (7, 3006509), (11, 1913233), (37, 568799), (77, 273319), (83, 253561), (89, 236467), (259, 81257), (407, 51709), (581, 36223), (623, 33781), (913, 23051), (979, 21497), (2849, 7387), (3071, 6853), (3293, 6391)]