21082581

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{83}}^1\times {\mathrm{167}}^1$

素因数の和:282

約数の個数: 36

約数和(自身を含む): 33572448

約数和(自身を除く): 12489867

約数列:

[1, 3, 9, 13, 39, 83, 117, 167, 169, 249, 501, 507, 747, 1079, 1503, 1521, 2171, 3237, 6513, 9711, 13861, 14027, 19539, 28223, 41583, 42081, 84669, 124749, 126243, 180193, 254007, 540579, 1621737, 2342509, 7027527, 21082581]

約数ペア:

[(1, 21082581), (3, 7027527), (9, 2342509), (13, 1621737), (39, 540579), (83, 254007), (117, 180193), (167, 126243), (169, 124749), (249, 84669), (501, 42081), (507, 41583), (747, 28223), (1079, 19539), (1503, 14027), (1521, 13861), (2171, 9711), (3237, 6513)]