21192340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81509}}^1$

素因数の和:81531

約数の個数: 24

約数和(自身を含む): 47927880

約数和(自身を除く): 26735540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81509, 163018, 326036, 407545, 815090, 1059617, 1630180, 2119234, 4238468, 5298085, 10596170, 21192340]

約数ペア:

[(1, 21192340), (2, 10596170), (4, 5298085), (5, 4238468), (10, 2119234), (13, 1630180), (20, 1059617), (26, 815090), (52, 407545), (65, 326036), (130, 163018), (260, 81509)]