72472720

素因数分解:

$2^4\times 5^1\times {\mathrm{905909}}^1$

素因数の和:905922

約数の個数: 20

約数和(自身を含む): 168499260

約数和(自身を除く): 96026540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 905909, 1811818, 3623636, 4529545, 7247272, 9059090, 14494544, 18118180, 36236360, 72472720]

約数ペア:

[(1, 72472720), (2, 36236360), (4, 18118180), (5, 14494544), (8, 9059090), (10, 7247272), (16, 4529545), (20, 3623636), (40, 1811818), (80, 905909)]