21155123

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:187

約数の個数: 32

約数和(自身を含む): 26127360

約数和(自身を除く): 4972237

約数列:

[1, 11, 17, 29, 47, 83, 187, 319, 493, 517, 799, 913, 1363, 1411, 2407, 3901, 5423, 8789, 14993, 15521, 23171, 26477, 40919, 42911, 66317, 113129, 254881, 450109, 729487, 1244419, 1923193, 21155123]

約数ペア:

[(1, 21155123), (11, 1923193), (17, 1244419), (29, 729487), (47, 450109), (83, 254881), (187, 113129), (319, 66317), (493, 42911), (517, 40919), (799, 26477), (913, 23171), (1363, 15521), (1411, 14993), (2407, 8789), (3901, 5423)]