638528079

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1600321}}^1$

素因数の和:1600350

約数の個数: 16

約数和(自身を含む): 1024206080

約数和(自身を除く): 385678001

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 1600321, 4800963, 11202247, 30406099, 33606741, 91218297, 212842693, 638528079]

約数ペア:

[(1, 638528079), (3, 212842693), (7, 91218297), (19, 33606741), (21, 30406099), (57, 11202247), (133, 4800963), (399, 1600321)]