21135455

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{1531}}^1$

素因数の和:1798

約数の個数: 16

約数和(自身を含む): 27796608

約数和(自身を除く): 6661153

約数列:

[1, 5, 11, 55, 251, 1255, 1531, 2761, 7655, 13805, 16841, 84205, 384281, 1921405, 4227091, 21135455]

約数ペア:

[(1, 21135455), (5, 4227091), (11, 1921405), (55, 384281), (251, 84205), (1255, 16841), (1531, 13805), (2761, 7655)]