28163420

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{12919}}^1$

素因数の和:13037

約数の個数: 24

約数和(自身を含む): 59690400

約数和(自身を除く): 31526980

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 12919, 25838, 51676, 64595, 129190, 258380, 1408171, 2816342, 5632684, 7040855, 14081710, 28163420]

約数ペア:

[(1, 28163420), (2, 14081710), (4, 7040855), (5, 5632684), (10, 2816342), (20, 1408171), (109, 258380), (218, 129190), (436, 64595), (545, 51676), (1090, 25838), (2180, 12919)]