20995513

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{127}}^1$

素因数の和:277

約数の個数: 32

約数和(自身を含む): 28016640

約数和(自身を除く): 7021127

約数列:

[1, 7, 11, 19, 77, 113, 127, 133, 209, 791, 889, 1243, 1397, 1463, 2147, 2413, 8701, 9779, 14351, 15029, 16891, 23617, 26543, 100457, 157861, 165319, 185801, 272669, 1105027, 1908683, 2999359, 20995513]

約数ペア:

[(1, 20995513), (7, 2999359), (11, 1908683), (19, 1105027), (77, 272669), (113, 185801), (127, 165319), (133, 157861), (209, 100457), (791, 26543), (889, 23617), (1243, 16891), (1397, 15029), (1463, 14351), (2147, 9779), (2413, 8701)]