20668240

素因数分解:

$2^4\times 5^1\times {\mathrm{258353}}^1$

素因数の和:258366

約数の個数: 20

約数和(自身を含む): 48053844

約数和(自身を除く): 27385604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258353, 516706, 1033412, 1291765, 2066824, 2583530, 4133648, 5167060, 10334120, 20668240]

約数ペア:

[(1, 20668240), (2, 10334120), (4, 5167060), (5, 4133648), (8, 2583530), (10, 2066824), (16, 1291765), (20, 1033412), (40, 516706), (80, 258353)]