20218145

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1\times {\mathrm{439}}^1$

素因数の和:656

約数の個数: 16

約数和(自身を含む): 24879360

約数和(自身を除く): 4661215

約数列:

[1, 5, 61, 151, 305, 439, 755, 2195, 9211, 26779, 46055, 66289, 133895, 331445, 4043629, 20218145]

約数ペア:

[(1, 20218145), (5, 4043629), (61, 331445), (151, 133895), (305, 66289), (439, 46055), (755, 26779), (2195, 9211)]