1991555488

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{37}}^2\times {\mathrm{269}}^1$

素因数の和:379

約数の個数: 108

約数和(自身を含む): 4379751810

約数和(自身を除く): 2388196322

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 37, 52, 74, 104, 148, 169, 208, 269, 296, 338, 416, 481, 538, 592, 676, 962, 1076, 1184, 1352, 1369, 1924, 2152, 2704, 2738, 3497, 3848, 4304, 5408, 5476, 6253, 6994, 7696, 8608, 9953, 10952, 12506, 13988, 15392, 17797, 19906, 21904, 25012, 27976, 35594, 39812, 43808, 45461, 50024, 55952, 71188, 79624, 90922, 100048, 111904, 129389, 142376, 159248, 181844, 200096, 231361, 258778, 284752, 318496, 363688, 368261, 462722, 517556, 569504, 727376, 736522, 925444, 1035112, 1454752, 1473044, 1682057, 1850888, 2070224, 2946088, 3364114, 3701776, 4140448, 4787393, 5892176, 6728228, 7403552, 9574786, 11784352, 13456456, 19149572, 26912912, 38299144, 53825824, 62236109, 76598288, 124472218, 153196576, 248944436, 497888872, 995777744, 1991555488]

約数ペア:

[(1, 1991555488), (2, 995777744), (4, 497888872), (8, 248944436), (13, 153196576), (16, 124472218), (26, 76598288), (32, 62236109), (37, 53825824), (52, 38299144), (74, 26912912), (104, 19149572), (148, 13456456), (169, 11784352), (208, 9574786), (269, 7403552), (296, 6728228), (338, 5892176), (416, 4787393), (481, 4140448), (538, 3701776), (592, 3364114), (676, 2946088), (962, 2070224), (1076, 1850888), (1184, 1682057), (1352, 1473044), (1369, 1454752), (1924, 1035112), (2152, 925444), (2704, 736522), (2738, 727376), (3497, 569504), (3848, 517556), (4304, 462722), (5408, 368261), (5476, 363688), (6253, 318496), (6994, 284752), (7696, 258778), (8608, 231361), (9953, 200096), (10952, 181844), (12506, 159248), (13988, 142376), (15392, 129389), (17797, 111904), (19906, 100048), (21904, 90922), (25012, 79624), (27976, 71188), (35594, 55952), (39812, 50024), (43808, 45461)]