21780456687

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{31}}^2\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:288

約数の個数: 144

約数和(自身を含む): 37648840320

約数和(自身を除く): 15868383633

約数列:

[1, 3, 9, 11, 27, 31, 33, 61, 81, 93, 99, 139, 183, 243, 279, 297, 341, 417, 549, 671, 837, 891, 961, 1023, 1251, 1529, 1647, 1891, 2013, 2511, 2673, 2883, 3069, 3753, 4309, 4587, 4941, 5673, 6039, 7533, 8479, 8649, 9207, 10571, 11259, 12927, 13761, 14823, 17019, 18117, 20801, 25437, 25947, 27621, 31713, 33777, 38781, 41283, 47399, 51057, 54351, 58621, 62403, 76311, 77841, 82863, 93269, 95139, 116343, 123849, 133579, 142197, 153171, 163053, 175863, 187209, 228933, 233523, 262849, 279807, 285417, 349029, 371547, 400737, 426591, 459513, 527589, 561627, 644831, 686799, 788547, 839421, 856251, 1047087, 1202211, 1279773, 1469369, 1582767, 1684881, 1934493, 2060397, 2365641, 2518263, 2568753, 2891339, 3606633, 3839319, 4408107, 4748301, 5054643, 5803479, 7096923, 7554789, 8148319, 8674017, 10819899, 11517957, 13224321, 14244903, 17410437, 21290769, 22664367, 24444957, 26022051, 32459697, 39672963, 52231311, 63872307, 73334871, 78066153, 89631509, 119018889, 156693933, 220004613, 234198459, 268894527, 357056667, 660013839, 702595377, 806683581, 1980041517, 2420050743, 7260152229, 21780456687]

約数ペア:

[(1, 21780456687), (3, 7260152229), (9, 2420050743), (11, 1980041517), (27, 806683581), (31, 702595377), (33, 660013839), (61, 357056667), (81, 268894527), (93, 234198459), (99, 220004613), (139, 156693933), (183, 119018889), (243, 89631509), (279, 78066153), (297, 73334871), (341, 63872307), (417, 52231311), (549, 39672963), (671, 32459697), (837, 26022051), (891, 24444957), (961, 22664367), (1023, 21290769), (1251, 17410437), (1529, 14244903), (1647, 13224321), (1891, 11517957), (2013, 10819899), (2511, 8674017), (2673, 8148319), (2883, 7554789), (3069, 7096923), (3753, 5803479), (4309, 5054643), (4587, 4748301), (4941, 4408107), (5673, 3839319), (6039, 3606633), (7533, 2891339), (8479, 2568753), (8649, 2518263), (9207, 2365641), (10571, 2060397), (11259, 1934493), (12927, 1684881), (13761, 1582767), (14823, 1469369), (17019, 1279773), (18117, 1202211), (20801, 1047087), (25437, 856251), (25947, 839421), (27621, 788547), (31713, 686799), (33777, 644831), (38781, 561627), (41283, 527589), (47399, 459513), (51057, 426591), (54351, 400737), (58621, 371547), (62403, 349029), (76311, 285417), (77841, 279807), (82863, 262849), (93269, 233523), (95139, 228933), (116343, 187209), (123849, 175863), (133579, 163053), (142197, 153171)]