18971540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{135511}}^1$

素因数の和:135527

約数の個数: 24

約数和(自身を含む): 45532032

約数和(自身を除く): 26560492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 135511, 271022, 542044, 677555, 948577, 1355110, 1897154, 2710220, 3794308, 4742885, 9485770, 18971540]

約数ペア:

[(1, 18971540), (2, 9485770), (4, 4742885), (5, 3794308), (7, 2710220), (10, 1897154), (14, 1355110), (20, 948577), (28, 677555), (35, 542044), (70, 271022), (140, 135511)]