21316561

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{4271}}^1$

素因数の和:4332

約数の個数: 16

約数和(自身を含む): 26247168

約数和(自身を除く): 4930607

約数列:

[1, 7, 23, 31, 161, 217, 713, 4271, 4991, 29897, 98233, 132401, 687631, 926807, 3045223, 21316561]

約数ペア:

[(1, 21316561), (7, 3045223), (23, 926807), (31, 687631), (161, 132401), (217, 98233), (713, 29897), (4271, 4991)]