21248305

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{3673}}^1$

素因数の和:3780

約数の個数: 16

約数和(自身を含む): 27775440

約数和(自身を除く): 6527135

約数列:

[1, 5, 13, 65, 89, 445, 1157, 3673, 5785, 18365, 47749, 238745, 326897, 1634485, 4249661, 21248305]

約数ペア:

[(1, 21248305), (5, 4249661), (13, 1634485), (65, 326897), (89, 238745), (445, 47749), (1157, 18365), (3673, 5785)]