21491701

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{6491}}^1$

素因数の和:6552

約数の個数: 16

約数和(自身を含む): 27422208

約数和(自身を除く): 5930507

約数列:

[1, 7, 11, 43, 77, 301, 473, 3311, 6491, 45437, 71401, 279113, 499807, 1953791, 3070243, 21491701]

約数ペア:

[(1, 21491701), (7, 3070243), (11, 1953791), (43, 499807), (77, 279113), (301, 71401), (473, 45437), (3311, 6491)]