20669165

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 28200960

約数和(自身を除く): 7531795

約数列:

[1, 5, 11, 55, 67, 71, 79, 335, 355, 395, 737, 781, 869, 3685, 3905, 4345, 4757, 5293, 5609, 23785, 26465, 28045, 52327, 58223, 61699, 261635, 291115, 308495, 375803, 1879015, 4133833, 20669165]

約数ペア:

[(1, 20669165), (5, 4133833), (11, 1879015), (55, 375803), (67, 308495), (71, 291115), (79, 261635), (335, 61699), (355, 58223), (395, 52327), (737, 28045), (781, 26465), (869, 23785), (3685, 5609), (3905, 5293), (4345, 4757)]