19721380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{140867}}^1$

素因数の和:140883

約数の個数: 24

約数和(自身を含む): 47331648

約数和(自身を除く): 27610268

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 140867, 281734, 563468, 704335, 986069, 1408670, 1972138, 2817340, 3944276, 4930345, 9860690, 19721380]

約数ペア:

[(1, 19721380), (2, 9860690), (4, 4930345), (5, 3944276), (7, 2817340), (10, 1972138), (14, 1408670), (20, 986069), (28, 704335), (35, 563468), (70, 281734), (140, 140867)]