81647260

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{240139}}^1$

素因数の和:240165

約数の個数: 24

約数和(自身を含む): 181545840

約数和(自身を除く): 99898580

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 240139, 480278, 960556, 1200695, 2401390, 4082363, 4802780, 8164726, 16329452, 20411815, 40823630, 81647260]

約数ペア:

[(1, 81647260), (2, 40823630), (4, 20411815), (5, 16329452), (10, 8164726), (17, 4802780), (20, 4082363), (34, 2401390), (68, 1200695), (85, 960556), (170, 480278), (340, 240139)]