19915888

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{40153}}^1$

素因数の和:40192

約数の個数: 20

約数和(自身を含む): 39832768

約数和(自身を除く): 19916880

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 40153, 80306, 160612, 321224, 642448, 1244743, 2489486, 4978972, 9957944, 19915888]

約数ペア:

[(1, 19915888), (2, 9957944), (4, 4978972), (8, 2489486), (16, 1244743), (31, 642448), (62, 321224), (124, 160612), (248, 80306), (496, 40153)]