21071180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81043}}^1$

素因数の和:81065

約数の個数: 24

約数和(自身を含む): 47653872

約数和(自身を除く): 26582692

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81043, 162086, 324172, 405215, 810430, 1053559, 1620860, 2107118, 4214236, 5267795, 10535590, 21071180]

約数ペア:

[(1, 21071180), (2, 10535590), (4, 5267795), (5, 4214236), (10, 2107118), (13, 1620860), (20, 1053559), (26, 810430), (52, 405215), (65, 324172), (130, 162086), (260, 81043)]