21715705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 29611008

約数和(自身を除く): 7895303

約数列:

[1, 5, 11, 55, 67, 71, 83, 335, 355, 415, 737, 781, 913, 3685, 3905, 4565, 4757, 5561, 5893, 23785, 27805, 29465, 52327, 61171, 64823, 261635, 305855, 324115, 394831, 1974155, 4343141, 21715705]

約数ペア:

[(1, 21715705), (5, 4343141), (11, 1974155), (55, 394831), (67, 324115), (71, 305855), (83, 261635), (335, 64823), (355, 61171), (415, 52327), (737, 29465), (781, 27805), (913, 23785), (3685, 5893), (3905, 5561), (4565, 4757)]