21075775

素因数分解:

$5^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{1451}}^1$

素因数の和:1551

約数の個数: 24

約数和(自身を含む): 30248064

約数和(自身を除く): 9172289

約数列:

[1, 5, 7, 25, 35, 83, 175, 415, 581, 1451, 2075, 2905, 7255, 10157, 14525, 36275, 50785, 120433, 253925, 602165, 843031, 3010825, 4215155, 21075775]

約数ペア:

[(1, 21075775), (5, 4215155), (7, 3010825), (25, 843031), (35, 602165), (83, 253925), (175, 120433), (415, 50785), (581, 36275), (1451, 14525), (2075, 10157), (2905, 7255)]