81015856

素因数分解:

$2^4\times {\mathrm{197}}^1\times {\mathrm{25703}}^1$

素因数の和:25908

約数の個数: 20

約数和(自身を含む): 157771152

約数和(自身を除く): 76755296

約数列:

[1, 2, 4, 8, 16, 197, 394, 788, 1576, 3152, 25703, 51406, 102812, 205624, 411248, 5063491, 10126982, 20253964, 40507928, 81015856]

約数ペア:

[(1, 81015856), (2, 40507928), (4, 20253964), (8, 10126982), (16, 5063491), (197, 411248), (394, 205624), (788, 102812), (1576, 51406), (3152, 25703)]