21255130

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12577}}^1$

素因数の和:12610

約数の個数: 24

約数和(自身を含む): 41431932

約数和(自身を除く): 20176802

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12577, 25154, 62885, 125770, 163501, 327002, 817505, 1635010, 2125513, 4251026, 10627565, 21255130]

約数ペア:

[(1, 21255130), (2, 10627565), (5, 4251026), (10, 2125513), (13, 1635010), (26, 817505), (65, 327002), (130, 163501), (169, 125770), (338, 62885), (845, 25154), (1690, 12577)]