81725180

素因数分解:

$2^2\times 5^1\times {\mathrm{809}}^1\times {\mathrm{5051}}^1$

素因数の和:5869

約数の個数: 24

約数和(自身を含む): 171869040

約数和(自身を除く): 90143860

約数列:

[1, 2, 4, 5, 10, 20, 809, 1618, 3236, 4045, 5051, 8090, 10102, 16180, 20204, 25255, 50510, 101020, 4086259, 8172518, 16345036, 20431295, 40862590, 81725180]

約数ペア:

[(1, 81725180), (2, 40862590), (4, 20431295), (5, 16345036), (10, 8172518), (20, 4086259), (809, 101020), (1618, 50510), (3236, 25255), (4045, 20204), (5051, 16180), (8090, 10102)]