20639355

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2909}}^1$

素因数の和:2971

約数の個数: 32

約数和(自身を含む): 36875520

約数和(自身を除く): 16236165

約数列:

[1, 3, 5, 11, 15, 33, 43, 55, 129, 165, 215, 473, 645, 1419, 2365, 2909, 7095, 8727, 14545, 31999, 43635, 95997, 125087, 159995, 375261, 479985, 625435, 1375957, 1876305, 4127871, 6879785, 20639355]

約数ペア:

[(1, 20639355), (3, 6879785), (5, 4127871), (11, 1876305), (15, 1375957), (33, 625435), (43, 479985), (55, 375261), (129, 159995), (165, 125087), (215, 95997), (473, 43635), (645, 31999), (1419, 14545), (2365, 8727), (2909, 7095)]