21721456

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{19121}}^1$

素因数の和:19200

約数の個数: 20

約数和(自身を含む): 42680304

約数和(自身を除く): 20958848

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 19121, 38242, 76484, 152968, 305936, 1357591, 2715182, 5430364, 10860728, 21721456]

約数ペア:

[(1, 21721456), (2, 10860728), (4, 5430364), (8, 2715182), (16, 1357591), (71, 305936), (142, 152968), (284, 76484), (568, 38242), (1136, 19121)]