21438904

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{157639}}^1$

素因数の和:157662

約数の個数: 16

約数和(自身を含む): 42562800

約数和(自身を除く): 21123896

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 157639, 315278, 630556, 1261112, 2679863, 5359726, 10719452, 21438904]

約数ペア:

[(1, 21438904), (2, 10719452), (4, 5359726), (8, 2679863), (17, 1261112), (34, 630556), (68, 315278), (136, 157639)]