21048013

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{239}}^1\times {\mathrm{547}}^1$

素因数の和:816

約数の個数: 16

約数和(自身を含む): 25251840

約数和(自身を除く): 4203827

約数列:

[1, 7, 23, 161, 239, 547, 1673, 3829, 5497, 12581, 38479, 88067, 130733, 915131, 3006859, 21048013]

約数ペア:

[(1, 21048013), (7, 3006859), (23, 915131), (161, 130733), (239, 88067), (547, 38479), (1673, 12581), (3829, 5497)]