21280295

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{613}}^1$

素因数の和:802

約数の個数: 16

約数和(自身を含む): 26259552

約数和(自身を除く): 4979257

約数列:

[1, 5, 53, 131, 265, 613, 655, 3065, 6943, 32489, 34715, 80303, 162445, 401515, 4256059, 21280295]

約数ペア:

[(1, 21280295), (5, 4256059), (53, 401515), (131, 162445), (265, 80303), (613, 34715), (655, 32489), (3065, 6943)]