1999804720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1315661}}^1$

素因数の和:1315693

約数の個数: 40

約数和(自身を含む): 4894262640

約数和(自身を除く): 2894457920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 1315661, 2631322, 5262644, 6578305, 10525288, 13156610, 21050576, 24997559, 26313220, 49995118, 52626440, 99990236, 105252880, 124987795, 199980472, 249975590, 399960944, 499951180, 999902360, 1999804720]

約数ペア:

[(1, 1999804720), (2, 999902360), (4, 499951180), (5, 399960944), (8, 249975590), (10, 199980472), (16, 124987795), (19, 105252880), (20, 99990236), (38, 52626440), (40, 49995118), (76, 26313220), (80, 24997559), (95, 21050576), (152, 13156610), (190, 10525288), (304, 6578305), (380, 5262644), (760, 2631322), (1520, 1315661)]