81881728

素因数分解:

$2^7\times {\mathrm{639701}}^1$

素因数の和:639715

約数の個数: 16

約数和(自身を含む): 163124010

約数和(自身を除く): 81242282

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 639701, 1279402, 2558804, 5117608, 10235216, 20470432, 40940864, 81881728]

約数ペア:

[(1, 81881728), (2, 40940864), (4, 20470432), (8, 10235216), (16, 5117608), (32, 2558804), (64, 1279402), (128, 639701)]