21080213

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{11903}}^1$

素因数の和:11944

約数の個数: 16

約数和(自身を含む): 27426816

約数和(自身を除く): 6346603

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 11903, 83321, 130933, 273769, 916531, 1916383, 3011459, 21080213]

約数ペア:

[(1, 21080213), (7, 3011459), (11, 1916383), (23, 916531), (77, 273769), (161, 130933), (253, 83321), (1771, 11903)]