21300815

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1\times {\mathrm{317}}^1$

素因数の和:562

約数の個数: 16

約数和(自身を含む): 26101440

約数和(自身を除く): 4800625

約数列:

[1, 5, 89, 151, 317, 445, 755, 1585, 13439, 28213, 47867, 67195, 141065, 239335, 4260163, 21300815]

約数ペア:

[(1, 21300815), (5, 4260163), (89, 239335), (151, 141065), (317, 67195), (445, 47867), (755, 28213), (1585, 13439)]