21228713

素因数分解:

${\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{1213}}^1$

素因数の和:1304

約数の個数: 16

約数和(自身を含む): 24357696

約数和(自身を除く): 3128983

約数列:

[1, 11, 37, 43, 407, 473, 1213, 1591, 13343, 17501, 44881, 52159, 493691, 573749, 1929883, 21228713]

約数ペア:

[(1, 21228713), (11, 1929883), (37, 573749), (43, 493691), (407, 52159), (473, 44881), (1213, 17501), (1591, 13343)]