21278906

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{787}}^1\times {\mathrm{1229}}^1$

素因数の和:2029

約数の個数: 16

約数和(自身を含む): 34892640

約数和(自身を除く): 13613734

約数列:

[1, 2, 11, 22, 787, 1229, 1574, 2458, 8657, 13519, 17314, 27038, 967223, 1934446, 10639453, 21278906]

約数ペア:

[(1, 21278906), (2, 10639453), (11, 1934446), (22, 967223), (787, 27038), (1229, 17314), (1574, 13519), (2458, 8657)]