81891990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{909911}}^1$

素因数の和:909924

約数の個数: 24

約数和(自身を含む): 212919408

約数和(自身を除く): 131027418

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 909911, 1819822, 2729733, 4549555, 5459466, 8189199, 9099110, 13648665, 16378398, 27297330, 40945995, 81891990]

約数ペア:

[(1, 81891990), (2, 40945995), (3, 27297330), (5, 16378398), (6, 13648665), (9, 9099110), (10, 8189199), (15, 5459466), (18, 4549555), (30, 2729733), (45, 1819822), (90, 909911)]