4500

素因数分解:

$2^2\times 3^2\times 5^3$

素因数の和:25

約数の個数: 36

約数和(自身を含む): 14196

約数和(自身を除く): 9696

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 90, 100, 125, 150, 180, 225, 250, 300, 375, 450, 500, 750, 900, 1125, 1500, 2250, 4500]

約数ペア:

[(1, 4500), (2, 2250), (3, 1500), (4, 1125), (5, 900), (6, 750), (9, 500), (10, 450), (12, 375), (15, 300), (18, 250), (20, 225), (25, 180), (30, 150), (36, 125), (45, 100), (50, 90), (60, 75)]