405140

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{431}}^1$

素因数の和:487

約数の個数: 24

約数和(自身を含む): 870912

約数和(自身を除く): 465772

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 431, 470, 862, 940, 1724, 2155, 4310, 8620, 20257, 40514, 81028, 101285, 202570, 405140]

約数ペア:

[(1, 405140), (2, 202570), (4, 101285), (5, 81028), (10, 40514), (20, 20257), (47, 8620), (94, 4310), (188, 2155), (235, 1724), (431, 940), (470, 862)]