20651785

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 32175360

約数和(自身を除く): 11523575

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 79, 97, 245, 385, 395, 485, 539, 553, 679, 869, 1067, 2695, 2765, 3395, 3871, 4345, 4753, 5335, 6083, 7469, 7663, 19355, 23765, 30415, 37345, 38315, 42581, 52283, 53641, 84293, 212905, 261415, 268205, 375487, 421465, 590051, 1877435, 2950255, 4130357, 20651785]

約数ペア:

[(1, 20651785), (5, 4130357), (7, 2950255), (11, 1877435), (35, 590051), (49, 421465), (55, 375487), (77, 268205), (79, 261415), (97, 212905), (245, 84293), (385, 53641), (395, 52283), (485, 42581), (539, 38315), (553, 37345), (679, 30415), (869, 23765), (1067, 19355), (2695, 7663), (2765, 7469), (3395, 6083), (3871, 5335), (4345, 4753)]