19660240

素因数分解:

$2^4\times 5^1\times {\mathrm{245753}}^1$

素因数の和:245766

約数の個数: 20

約数和(自身を含む): 45710244

約数和(自身を除く): 26050004

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245753, 491506, 983012, 1228765, 1966024, 2457530, 3932048, 4915060, 9830120, 19660240]

約数ペア:

[(1, 19660240), (2, 9830120), (4, 4915060), (5, 3932048), (8, 2457530), (10, 1966024), (16, 1228765), (20, 983012), (40, 491506), (80, 245753)]