20051515

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:192

約数の個数: 32

約数和(自身を含む): 27827712

約数和(自身を除く): 7776197

約数列:

[1, 5, 11, 23, 55, 115, 121, 131, 253, 605, 655, 1265, 1331, 1441, 2783, 3013, 6655, 7205, 13915, 15065, 15851, 30613, 33143, 79255, 153065, 165715, 174361, 364573, 871805, 1822865, 4010303, 20051515]

約数ペア:

[(1, 20051515), (5, 4010303), (11, 1822865), (23, 871805), (55, 364573), (115, 174361), (121, 165715), (131, 153065), (253, 79255), (605, 33143), (655, 30613), (1265, 15851), (1331, 15065), (1441, 13915), (2783, 7205), (3013, 6655)]