20995205

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2371}}^1$

素因数の和:2417

約数の個数: 32

約数和(自身を含む): 32790528

約数和(自身を除く): 11795323

約数列:

[1, 5, 7, 11, 23, 35, 55, 77, 115, 161, 253, 385, 805, 1265, 1771, 2371, 8855, 11855, 16597, 26081, 54533, 82985, 130405, 182567, 272665, 381731, 599863, 912835, 1908655, 2999315, 4199041, 20995205]

約数ペア:

[(1, 20995205), (5, 4199041), (7, 2999315), (11, 1908655), (23, 912835), (35, 599863), (55, 381731), (77, 272665), (115, 182567), (161, 130405), (253, 82985), (385, 54533), (805, 26081), (1265, 16597), (1771, 11855), (2371, 8855)]