1285120180

素因数分解:

$2^2\times 5^1\times {\mathrm{64256009}}^1$

素因数の和:64256018

約数の個数: 12

約数和(自身を含む): 2698752420

約数和(自身を除く): 1413632240

約数列:

[1, 2, 4, 5, 10, 20, 64256009, 128512018, 257024036, 321280045, 642560090, 1285120180]

約数ペア:

[(1, 1285120180), (2, 642560090), (4, 321280045), (5, 257024036), (10, 128512018), (20, 64256009)]