21290613

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{2659}}^1$

素因数の和:2836

約数の個数: 16

約数和(自身を含む): 30260160

約数和(自身を除く): 8969547

約数列:

[1, 3, 17, 51, 157, 471, 2659, 2669, 7977, 8007, 45203, 135609, 417463, 1252389, 7096871, 21290613]

約数ペア:

[(1, 21290613), (3, 7096871), (17, 1252389), (51, 417463), (157, 135609), (471, 45203), (2659, 8007), (2669, 7977)]