20785985

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:134

約数の個数: 48

約数和(自身を含む): 30336768

約数和(自身を除く): 9550783

約数列:

[1, 5, 11, 17, 43, 47, 55, 85, 121, 187, 215, 235, 473, 517, 605, 731, 799, 935, 2021, 2057, 2365, 2585, 3655, 3995, 5203, 5687, 8041, 8789, 10105, 10285, 22231, 26015, 28435, 34357, 40205, 43945, 88451, 96679, 111155, 171785, 244541, 377927, 442255, 483395, 1222705, 1889635, 4157197, 20785985]

約数ペア:

[(1, 20785985), (5, 4157197), (11, 1889635), (17, 1222705), (43, 483395), (47, 442255), (55, 377927), (85, 244541), (121, 171785), (187, 111155), (215, 96679), (235, 88451), (473, 43945), (517, 40205), (605, 34357), (731, 28435), (799, 26015), (935, 22231), (2021, 10285), (2057, 10105), (2365, 8789), (2585, 8041), (3655, 5687), (3995, 5203)]