19840180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{479}}^1$

素因数の和:616

約数の個数: 48

約数和(自身を含む): 44352000

約数和(自身を除く): 24511820

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 109, 190, 218, 380, 436, 479, 545, 958, 1090, 1916, 2071, 2180, 2395, 4142, 4790, 8284, 9101, 9580, 10355, 18202, 20710, 36404, 41420, 45505, 52211, 91010, 104422, 182020, 208844, 261055, 522110, 992009, 1044220, 1984018, 3968036, 4960045, 9920090, 19840180]

約数ペア:

[(1, 19840180), (2, 9920090), (4, 4960045), (5, 3968036), (10, 1984018), (19, 1044220), (20, 992009), (38, 522110), (76, 261055), (95, 208844), (109, 182020), (190, 104422), (218, 91010), (380, 52211), (436, 45505), (479, 41420), (545, 36404), (958, 20710), (1090, 18202), (1916, 10355), (2071, 9580), (2180, 9101), (2395, 8284), (4142, 4790)]