19720746

素因数分解:

$2^1\times 3^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:225

約数の個数: 80

約数和(自身を含む): 47916000

約数和(自身を除く): 28195254

約数列:

[1, 2, 3, 6, 9, 18, 19, 27, 38, 43, 54, 57, 81, 86, 114, 129, 149, 162, 171, 258, 298, 342, 387, 447, 513, 774, 817, 894, 1026, 1161, 1341, 1539, 1634, 2322, 2451, 2682, 2831, 3078, 3483, 4023, 4902, 5662, 6407, 6966, 7353, 8046, 8493, 12069, 12814, 14706, 16986, 19221, 22059, 24138, 25479, 38442, 44118, 50958, 57663, 66177, 76437, 115326, 121733, 132354, 152874, 172989, 229311, 243466, 345978, 365199, 458622, 518967, 730398, 1037934, 1095597, 2191194, 3286791, 6573582, 9860373, 19720746]

約数ペア:

[(1, 19720746), (2, 9860373), (3, 6573582), (6, 3286791), (9, 2191194), (18, 1095597), (19, 1037934), (27, 730398), (38, 518967), (43, 458622), (54, 365199), (57, 345978), (81, 243466), (86, 229311), (114, 172989), (129, 152874), (149, 132354), (162, 121733), (171, 115326), (258, 76437), (298, 66177), (342, 57663), (387, 50958), (447, 44118), (513, 38442), (774, 25479), (817, 24138), (894, 22059), (1026, 19221), (1161, 16986), (1341, 14706), (1539, 12814), (1634, 12069), (2322, 8493), (2451, 8046), (2682, 7353), (2831, 6966), (3078, 6407), (3483, 5662), (4023, 4902)]