28191640

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{7919}}^1$

素因数の和:8019

約数の個数: 32

約数和(自身を含む): 64152000

約数和(自身を除く): 35960360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 7919, 15838, 31676, 39595, 63352, 79190, 158380, 316760, 704791, 1409582, 2819164, 3523955, 5638328, 7047910, 14095820, 28191640]

約数ペア:

[(1, 28191640), (2, 14095820), (4, 7047910), (5, 5638328), (8, 3523955), (10, 2819164), (20, 1409582), (40, 704791), (89, 316760), (178, 158380), (356, 79190), (445, 63352), (712, 39595), (890, 31676), (1780, 15838), (3560, 7919)]