21281816

素因数分解:

$2^3\times {\mathrm{281}}^1\times {\mathrm{9467}}^1$

素因数の和:9754

約数の個数: 16

約数和(自身を含む): 40049640

約数和(自身を除く): 18767824

約数列:

[1, 2, 4, 8, 281, 562, 1124, 2248, 9467, 18934, 37868, 75736, 2660227, 5320454, 10640908, 21281816]

約数ペア:

[(1, 21281816), (2, 10640908), (4, 5320454), (8, 2660227), (281, 75736), (562, 37868), (1124, 18934), (2248, 9467)]