18977980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{283}}^1\times {\mathrm{479}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 45803520

約数和(自身を除く): 26825540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 283, 479, 566, 958, 1132, 1415, 1916, 1981, 2395, 2830, 3353, 3962, 4790, 5660, 6706, 7924, 9580, 9905, 13412, 16765, 19810, 33530, 39620, 67060, 135557, 271114, 542228, 677785, 948899, 1355570, 1897798, 2711140, 3795596, 4744495, 9488990, 18977980]

約数ペア:

[(1, 18977980), (2, 9488990), (4, 4744495), (5, 3795596), (7, 2711140), (10, 1897798), (14, 1355570), (20, 948899), (28, 677785), (35, 542228), (70, 271114), (140, 135557), (283, 67060), (479, 39620), (566, 33530), (958, 19810), (1132, 16765), (1415, 13412), (1916, 9905), (1981, 9580), (2395, 7924), (2830, 6706), (3353, 5660), (3962, 4790)]