19788901

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:201

約数の個数: 32

約数和(自身を含む): 24634368

約数和(自身を除く): 4845467

約数列:

[1, 11, 17, 23, 43, 107, 187, 253, 391, 473, 731, 989, 1177, 1819, 2461, 4301, 4601, 8041, 10879, 16813, 20009, 27071, 41837, 50611, 78217, 105823, 184943, 460207, 860387, 1164053, 1798991, 19788901]

約数ペア:

[(1, 19788901), (11, 1798991), (17, 1164053), (23, 860387), (43, 460207), (107, 184943), (187, 105823), (253, 78217), (391, 50611), (473, 41837), (731, 27071), (989, 20009), (1177, 16813), (1819, 10879), (2461, 8041), (4301, 4601)]