266980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{1907}}^1$

素因数の和:1923

約数の個数: 24

約数和(自身を含む): 641088

約数和(自身を除く): 374108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 1907, 3814, 7628, 9535, 13349, 19070, 26698, 38140, 53396, 66745, 133490, 266980]

約数ペア:

[(1, 266980), (2, 133490), (4, 66745), (5, 53396), (7, 38140), (10, 26698), (14, 19070), (20, 13349), (28, 9535), (35, 7628), (70, 3814), (140, 1907)]