20818105

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2351}}^1$

素因数の和:2397

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 11695943

約数列:

[1, 5, 7, 11, 23, 35, 55, 77, 115, 161, 253, 385, 805, 1265, 1771, 2351, 8855, 11755, 16457, 25861, 54073, 82285, 129305, 181027, 270365, 378511, 594803, 905135, 1892555, 2974015, 4163621, 20818105]

約数ペア:

[(1, 20818105), (5, 4163621), (7, 2974015), (11, 1892555), (23, 905135), (35, 594803), (55, 378511), (77, 270365), (115, 181027), (161, 129305), (253, 82285), (385, 54073), (805, 25861), (1265, 16457), (1771, 11755), (2351, 8855)]