20145895

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 31256064

約数和(自身を除く): 11110169

約数列:

[1, 5, 7, 11, 35, 55, 67, 71, 77, 121, 335, 355, 385, 469, 497, 605, 737, 781, 847, 2345, 2485, 3685, 3905, 4235, 4757, 5159, 5467, 8107, 8591, 23785, 25795, 27335, 33299, 40535, 42955, 52327, 56749, 60137, 166495, 261635, 283745, 300685, 366289, 575597, 1831445, 2877985, 4029179, 20145895]

約数ペア:

[(1, 20145895), (5, 4029179), (7, 2877985), (11, 1831445), (35, 575597), (55, 366289), (67, 300685), (71, 283745), (77, 261635), (121, 166495), (335, 60137), (355, 56749), (385, 52327), (469, 42955), (497, 40535), (605, 33299), (737, 27335), (781, 25795), (847, 23785), (2345, 8591), (2485, 8107), (3685, 5467), (3905, 5159), (4235, 4757)]