81239728

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{118081}}^1$

素因数の和:118132

約数の個数: 20

約数和(自身を含む): 161063848

約数和(自身を除く): 79824120

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 118081, 236162, 472324, 944648, 1889296, 5077483, 10154966, 20309932, 40619864, 81239728]

約数ペア:

[(1, 81239728), (2, 40619864), (4, 20309932), (8, 10154966), (16, 5077483), (43, 1889296), (86, 944648), (172, 472324), (344, 236162), (688, 118081)]