21356881

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{6343}}^1$

素因数の和:6400

約数の個数: 16

約数和(自身を含む): 27000064

約数和(自身を除く): 5643183

約数列:

[1, 7, 13, 37, 91, 259, 481, 3367, 6343, 44401, 82459, 234691, 577213, 1642837, 3050983, 21356881]

約数ペア:

[(1, 21356881), (7, 3050983), (13, 1642837), (37, 577213), (91, 234691), (259, 82459), (481, 44401), (3367, 6343)]