21071967

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{7901}}^1$

素因数の和:8038

約数の個数: 16

約数和(自身を含む): 32366592

約数和(自身を除く): 11294625

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 7901, 23703, 55307, 165921, 1003427, 3010281, 7023989, 21071967]

約数ペア:

[(1, 21071967), (3, 7023989), (7, 3010281), (21, 1003427), (127, 165921), (381, 55307), (889, 23703), (2667, 7901)]