21869155

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1321}}^1$

素因数の和:1387

約数の個数: 32

約数和(自身を含む): 33504768

約数和(自身を除く): 11635613

約数列:

[1, 5, 7, 11, 35, 43, 55, 77, 215, 301, 385, 473, 1321, 1505, 2365, 3311, 6605, 9247, 14531, 16555, 46235, 56803, 72655, 101717, 284015, 397621, 508585, 624833, 1988105, 3124165, 4373831, 21869155]

約数ペア:

[(1, 21869155), (5, 4373831), (7, 3124165), (11, 1988105), (35, 624833), (43, 508585), (55, 397621), (77, 284015), (215, 101717), (301, 72655), (385, 56803), (473, 46235), (1321, 16555), (1505, 14531), (2365, 9247), (3311, 6605)]