18720515

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:164

約数の個数: 32

約数和(自身を含む): 25824960

約数和(自身を除く): 7104445

約数列:

[1, 5, 11, 29, 55, 97, 121, 145, 319, 485, 605, 1067, 1331, 1595, 2813, 3509, 5335, 6655, 11737, 14065, 17545, 30943, 38599, 58685, 129107, 154715, 192995, 340373, 645535, 1701865, 3744103, 18720515]

約数ペア:

[(1, 18720515), (5, 3744103), (11, 1701865), (29, 645535), (55, 340373), (97, 192995), (121, 154715), (145, 129107), (319, 58685), (485, 38599), (605, 30943), (1067, 17545), (1331, 14065), (1595, 11737), (2813, 6655), (3509, 5335)]