20780085

素因数分解:

$3^1\times 5^1\times {\mathrm{521}}^1\times {\mathrm{2659}}^1$

素因数の和:3188

約数の個数: 16

約数和(自身を含む): 33324480

約数和(自身を除く): 12544395

約数列:

[1, 3, 5, 15, 521, 1563, 2605, 2659, 7815, 7977, 13295, 39885, 1385339, 4156017, 6926695, 20780085]

約数ペア:

[(1, 20780085), (3, 6926695), (5, 4156017), (15, 1385339), (521, 39885), (1563, 13295), (2605, 7977), (2659, 7815)]