20454320

素因数分解:

$2^4\times 5^1\times {\mathrm{255679}}^1$

素因数の和:255692

約数の個数: 20

約数和(自身を含む): 47556480

約数和(自身を除く): 27102160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255679, 511358, 1022716, 1278395, 2045432, 2556790, 4090864, 5113580, 10227160, 20454320]

約数ペア:

[(1, 20454320), (2, 10227160), (4, 5113580), (5, 4090864), (8, 2556790), (10, 2045432), (16, 1278395), (20, 1022716), (40, 511358), (80, 255679)]