19878556

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{2459}}^1$

素因数の和:2553

約数の個数: 24

約数和(自身を含む): 36368640

約数和(自身を除く): 16490084

約数列:

[1, 2, 4, 43, 47, 86, 94, 172, 188, 2021, 2459, 4042, 4918, 8084, 9836, 105737, 115573, 211474, 231146, 422948, 462292, 4969639, 9939278, 19878556]

約数ペア:

[(1, 19878556), (2, 9939278), (4, 4969639), (43, 462292), (47, 422948), (86, 231146), (94, 211474), (172, 115573), (188, 105737), (2021, 9836), (2459, 8084), (4042, 4918)]