20163781720

素因数分解:

$2^3\times 5^1\times {\mathrm{504094543}}^1$

素因数の和:504094554

約数の個数: 16

約数和(自身を含む): 45368508960

約数和(自身を除く): 25204727240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 504094543, 1008189086, 2016378172, 2520472715, 4032756344, 5040945430, 10081890860, 20163781720]

約数ペア:

[(1, 20163781720), (2, 10081890860), (4, 5040945430), (5, 4032756344), (8, 2520472715), (10, 2016378172), (20, 1008189086), (40, 504094543)]