20905785

素因数分解:

$3^2\times 5^1\times {\mathrm{601}}^1\times {\mathrm{773}}^1$

素因数の和:1385

約数の個数: 24

約数和(自身を含む): 36343944

約数和(自身を除く): 15438159

約数列:

[1, 3, 5, 9, 15, 45, 601, 773, 1803, 2319, 3005, 3865, 5409, 6957, 9015, 11595, 27045, 34785, 464573, 1393719, 2322865, 4181157, 6968595, 20905785]

約数ペア:

[(1, 20905785), (3, 6968595), (5, 4181157), (9, 2322865), (15, 1393719), (45, 464573), (601, 34785), (773, 27045), (1803, 11595), (2319, 9015), (3005, 6957), (3865, 5409)]