21838820

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12269}}^1$

素因数の和:12367

約数の個数: 24

約数和(自身を含む): 46380600

約数和(自身を除く): 24541780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12269, 24538, 49076, 61345, 122690, 245380, 1091941, 2183882, 4367764, 5459705, 10919410, 21838820]

約数ペア:

[(1, 21838820), (2, 10919410), (4, 5459705), (5, 4367764), (10, 2183882), (20, 1091941), (89, 245380), (178, 122690), (356, 61345), (445, 49076), (890, 24538), (1780, 12269)]