19915984

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{113159}}^1$

素因数の和:113178

約数の個数: 20

約数和(自身を含む): 42095520

約数和(自身を除く): 22179536

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 113159, 226318, 452636, 905272, 1244749, 1810544, 2489498, 4978996, 9957992, 19915984]

約数ペア:

[(1, 19915984), (2, 9957992), (4, 4978996), (8, 2489498), (11, 1810544), (16, 1244749), (22, 905272), (44, 452636), (88, 226318), (176, 113159)]