19661257

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1$

素因数の和:277

約数の個数: 32

約数和(自身を含む): 26265600

約数和(自身を除く): 6604343

約数列:

[1, 7, 11, 19, 77, 89, 133, 151, 209, 623, 979, 1057, 1463, 1661, 1691, 2869, 6853, 11627, 11837, 13439, 18601, 20083, 31559, 94073, 130207, 147829, 220913, 255341, 1034803, 1787387, 2808751, 19661257]

約数ペア:

[(1, 19661257), (7, 2808751), (11, 1787387), (19, 1034803), (77, 255341), (89, 220913), (133, 147829), (151, 130207), (209, 94073), (623, 31559), (979, 20083), (1057, 18601), (1463, 13439), (1661, 11837), (1691, 11627), (2869, 6853)]