21179847

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{3907}}^1$

素因数の和:4062

約数の個数: 16

約数和(自身を含む): 30638720

約数和(自身を除く): 9458873

約数列:

[1, 3, 13, 39, 139, 417, 1807, 3907, 5421, 11721, 50791, 152373, 543073, 1629219, 7059949, 21179847]

約数ペア:

[(1, 21179847), (3, 7059949), (13, 1629219), (39, 543073), (139, 152373), (417, 50791), (1807, 11721), (3907, 5421)]