19389155

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1\times {\mathrm{421}}^1$

素因数の和:638

約数の個数: 16

約数和(自身を含む): 23861568

約数和(自身を除く): 4472413

約数列:

[1, 5, 61, 151, 305, 421, 755, 2105, 9211, 25681, 46055, 63571, 128405, 317855, 3877831, 19389155]

約数ペア:

[(1, 19389155), (5, 3877831), (61, 317855), (151, 128405), (305, 63571), (421, 46055), (755, 25681), (2105, 9211)]