28921263

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{10513}}^1$

素因数の和:10654

約数の個数: 16

約数和(自身を含む): 44411136

約数和(自身を除く): 15489873

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 10513, 31539, 73591, 220773, 1377203, 4131609, 9640421, 28921263]

約数ペア:

[(1, 28921263), (3, 9640421), (7, 4131609), (21, 1377203), (131, 220773), (393, 73591), (917, 31539), (2751, 10513)]