20696571

素因数分解:

$3^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{661}}^1$

素因数の和:752

約数の個数: 36

約数和(自身を含む): 35319024

約数和(自身を除く): 14622453

約数列:

[1, 3, 7, 9, 21, 49, 63, 71, 147, 213, 441, 497, 639, 661, 1491, 1983, 3479, 4473, 4627, 5949, 10437, 13881, 31311, 32389, 41643, 46931, 97167, 140793, 291501, 328517, 422379, 985551, 2299619, 2956653, 6898857, 20696571]

約数ペア:

[(1, 20696571), (3, 6898857), (7, 2956653), (9, 2299619), (21, 985551), (49, 422379), (63, 328517), (71, 291501), (147, 140793), (213, 97167), (441, 46931), (497, 41643), (639, 32389), (661, 31311), (1491, 13881), (1983, 10437), (3479, 5949), (4473, 4627)]