21120818

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{10487}}^1$

素因数の和:10561

約数の個数: 16

約数和(自身を含む): 33981120

約数和(自身を除く): 12860302

約数列:

[1, 2, 19, 38, 53, 106, 1007, 2014, 10487, 20974, 199253, 398506, 555811, 1111622, 10560409, 21120818]

約数ペア:

[(1, 21120818), (2, 10560409), (19, 1111622), (38, 555811), (53, 398506), (106, 199253), (1007, 20974), (2014, 10487)]