18219878

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{4139}}^1$

素因数の和:4243

約数の個数: 16

約数和(自身を含む): 28615680

約数和(自身を除く): 10395802

約数列:

[1, 2, 31, 62, 71, 142, 2201, 4139, 4402, 8278, 128309, 256618, 293869, 587738, 9109939, 18219878]

約数ペア:

[(1, 18219878), (2, 9109939), (31, 587738), (62, 293869), (71, 256618), (142, 128309), (2201, 8278), (4139, 4402)]