21771585

素因数分解:

$3^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1$

素因数の和:218

約数の個数: 64

約数和(自身を含む): 42981120

約数和(自身を除く): 21209535

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 135, 165, 181, 243, 297, 405, 495, 543, 729, 891, 905, 1215, 1485, 1629, 1991, 2187, 2673, 2715, 3645, 4455, 4887, 5973, 8019, 8145, 9955, 10935, 13365, 14661, 17919, 24057, 24435, 29865, 40095, 43983, 53757, 73305, 89595, 120285, 131949, 161271, 219915, 268785, 395847, 483813, 659745, 806355, 1451439, 1979235, 2419065, 4354317, 7257195, 21771585]

約数ペア:

[(1, 21771585), (3, 7257195), (5, 4354317), (9, 2419065), (11, 1979235), (15, 1451439), (27, 806355), (33, 659745), (45, 483813), (55, 395847), (81, 268785), (99, 219915), (135, 161271), (165, 131949), (181, 120285), (243, 89595), (297, 73305), (405, 53757), (495, 43983), (543, 40095), (729, 29865), (891, 24435), (905, 24057), (1215, 17919), (1485, 14661), (1629, 13365), (1991, 10935), (2187, 9955), (2673, 8145), (2715, 8019), (3645, 5973), (4455, 4887)]