66639640

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{18719}}^1$

素因数の和:18819

約数の個数: 32

約数和(自身を含む): 151632000

約数和(自身を除く): 84992360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 18719, 37438, 74876, 93595, 149752, 187190, 374380, 748760, 1665991, 3331982, 6663964, 8329955, 13327928, 16659910, 33319820, 66639640]

約数ペア:

[(1, 66639640), (2, 33319820), (4, 16659910), (5, 13327928), (8, 8329955), (10, 6663964), (20, 3331982), (40, 1665991), (89, 748760), (178, 374380), (356, 187190), (445, 149752), (712, 93595), (890, 74876), (1780, 37438), (3560, 18719)]