19720904

素因数分解:

$2^3\times 7^1\times {\mathrm{211}}^1\times {\mathrm{1669}}^1$

素因数の和:1893

約数の個数: 32

約数和(自身を含む): 42484800

約数和(自身を除く): 22763896

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 211, 422, 844, 1477, 1669, 1688, 2954, 3338, 5908, 6676, 11683, 11816, 13352, 23366, 46732, 93464, 352159, 704318, 1408636, 2465113, 2817272, 4930226, 9860452, 19720904]

約数ペア:

[(1, 19720904), (2, 9860452), (4, 4930226), (7, 2817272), (8, 2465113), (14, 1408636), (28, 704318), (56, 352159), (211, 93464), (422, 46732), (844, 23366), (1477, 13352), (1669, 11816), (1688, 11683), (2954, 6676), (3338, 5908)]