21038721

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{523}}^1$

素因数の和:613

約数の個数: 32

約数和(自身を含む): 32596992

約数和(自身を除く): 11558271

約数列:

[1, 3, 11, 23, 33, 53, 69, 159, 253, 523, 583, 759, 1219, 1569, 1749, 3657, 5753, 12029, 13409, 17259, 27719, 36087, 40227, 83157, 132319, 304909, 396957, 637537, 914727, 1912611, 7012907, 21038721]

約数ペア:

[(1, 21038721), (3, 7012907), (11, 1912611), (23, 914727), (33, 637537), (53, 396957), (69, 304909), (159, 132319), (253, 83157), (523, 40227), (583, 36087), (759, 27719), (1219, 17259), (1569, 13409), (1749, 12029), (3657, 5753)]