221249321279

素因数分解:

$7^3\times {\mathrm{43}}^1\times {\mathrm{15000971}}^1$

素因数の和:15001035

約数の個数: 16

約数和(自身を含む): 264017107200

約数和(自身を除く): 42767785921

約数列:

[1, 7, 43, 49, 301, 343, 2107, 14749, 15000971, 105006797, 645041753, 735047579, 4515292271, 5145333053, 31607045897, 221249321279]

約数ペア:

[(1, 221249321279), (7, 31607045897), (43, 5145333053), (49, 4515292271), (301, 735047579), (343, 645041753), (2107, 105006797), (14749, 15000971)]