990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^1$

素因数の和:24

約数の個数: 24

約数和(自身を含む): 2808

約数和(自身を除く): 1818

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990]

約数ペア:

[(1, 990), (2, 495), (3, 330), (5, 198), (6, 165), (9, 110), (10, 99), (11, 90), (15, 66), (18, 55), (22, 45), (30, 33)]