21787931

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:179

約数の個数: 32

約数和(自身を含む): 26790912

約数和(自身を除く): 5002981

約数列:

[1, 11, 17, 37, 47, 67, 187, 407, 517, 629, 737, 799, 1139, 1739, 2479, 3149, 6919, 8789, 12529, 19129, 27269, 29563, 34639, 42143, 53533, 116513, 325193, 463573, 588863, 1281643, 1980721, 21787931]

約数ペア:

[(1, 21787931), (11, 1980721), (17, 1281643), (37, 588863), (47, 463573), (67, 325193), (187, 116513), (407, 53533), (517, 42143), (629, 34639), (737, 29563), (799, 27269), (1139, 19129), (1739, 12529), (2479, 8789), (3149, 6919)]