720680

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{419}}^1$

素因数の和:473

約数の個数: 32

約数和(自身を含む): 1663200

約数和(自身を除く): 942520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 419, 430, 838, 860, 1676, 1720, 2095, 3352, 4190, 8380, 16760, 18017, 36034, 72068, 90085, 144136, 180170, 360340, 720680]

約数ペア:

[(1, 720680), (2, 360340), (4, 180170), (5, 144136), (8, 90085), (10, 72068), (20, 36034), (40, 18017), (43, 16760), (86, 8380), (172, 4190), (215, 3352), (344, 2095), (419, 1720), (430, 1676), (838, 860)]