18009140

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{937}}^1$

素因数の和:1008

約数の個数: 36

約数和(自身を含む): 39120228

約数和(自身を除く): 21111088

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 937, 961, 1874, 1922, 3748, 3844, 4685, 4805, 9370, 9610, 18740, 19220, 29047, 58094, 116188, 145235, 290470, 580940, 900457, 1800914, 3601828, 4502285, 9004570, 18009140]

約数ペア:

[(1, 18009140), (2, 9004570), (4, 4502285), (5, 3601828), (10, 1800914), (20, 900457), (31, 580940), (62, 290470), (124, 145235), (155, 116188), (310, 58094), (620, 29047), (937, 19220), (961, 18740), (1874, 9610), (1922, 9370), (3748, 4805), (3844, 4685)]