20784195

素因数分解:

$3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:146

約数の個数: 80

約数和(自身を含む): 40830240

約数和(自身を除く): 20046045

約数列:

[1, 3, 5, 9, 15, 19, 27, 37, 45, 57, 73, 81, 95, 111, 135, 171, 185, 219, 285, 333, 365, 405, 513, 555, 657, 703, 855, 999, 1095, 1387, 1539, 1665, 1971, 2109, 2565, 2701, 2997, 3285, 3515, 4161, 4995, 5913, 6327, 6935, 7695, 8103, 9855, 10545, 12483, 13505, 14985, 18981, 20805, 24309, 29565, 31635, 37449, 40515, 51319, 56943, 62415, 72927, 94905, 112347, 121545, 153957, 187245, 218781, 256595, 284715, 364635, 461871, 561735, 769785, 1093905, 1385613, 2309355, 4156839, 6928065, 20784195]

約数ペア:

[(1, 20784195), (3, 6928065), (5, 4156839), (9, 2309355), (15, 1385613), (19, 1093905), (27, 769785), (37, 561735), (45, 461871), (57, 364635), (73, 284715), (81, 256595), (95, 218781), (111, 187245), (135, 153957), (171, 121545), (185, 112347), (219, 94905), (285, 72927), (333, 62415), (365, 56943), (405, 51319), (513, 40515), (555, 37449), (657, 31635), (703, 29565), (855, 24309), (999, 20805), (1095, 18981), (1387, 14985), (1539, 13505), (1665, 12483), (1971, 10545), (2109, 9855), (2565, 8103), (2701, 7695), (2997, 6935), (3285, 6327), (3515, 5913), (4161, 4995)]