18920205

素因数分解:

$3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{7933}}^1$

素因数の和:7997

約数の個数: 24

約数和(自身を含む): 33418008

約数和(自身を除く): 14497803

約数列:

[1, 3, 5, 9, 15, 45, 53, 159, 265, 477, 795, 2385, 7933, 23799, 39665, 71397, 118995, 356985, 420449, 1261347, 2102245, 3784041, 6306735, 18920205]

約数ペア:

[(1, 18920205), (3, 6306735), (5, 3784041), (9, 2102245), (15, 1261347), (45, 420449), (53, 356985), (159, 118995), (265, 71397), (477, 39665), (795, 23799), (2385, 7933)]