18890140

素因数分解:

$2^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{3037}}^1$

素因数の和:3357

約数の個数: 24

約数和(自身を含む): 39809952

約数和(自身を除く): 20919812

約数列:

[1, 2, 4, 5, 10, 20, 311, 622, 1244, 1555, 3037, 3110, 6074, 6220, 12148, 15185, 30370, 60740, 944507, 1889014, 3778028, 4722535, 9445070, 18890140]

約数ペア:

[(1, 18890140), (2, 9445070), (4, 4722535), (5, 3778028), (10, 1889014), (20, 944507), (311, 60740), (622, 30370), (1244, 15185), (1555, 12148), (3037, 6220), (3110, 6074)]