19005804587

素因数分解:

$7^4\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1$

素因数の和:398

約数の個数: 80

約数和(自身を含む): 25207386624

約数和(自身を除く): 6201582037

約数列:

[1, 7, 11, 47, 49, 61, 77, 251, 329, 343, 427, 517, 539, 671, 1757, 2303, 2401, 2761, 2867, 2989, 3619, 3773, 4697, 11797, 12299, 15311, 16121, 19327, 20069, 20923, 25333, 26411, 31537, 32879, 82579, 86093, 107177, 112847, 129767, 135289, 140483, 146461, 168421, 177331, 220759, 230153, 578053, 602651, 719617, 750239, 908369, 947023, 983381, 1178947, 1241317, 1545313, 1611071, 4046371, 5037319, 5251673, 6358583, 6629161, 6883667, 7915787, 8252629, 10817191, 28324597, 35261233, 36761711, 44510081, 55410509, 57768403, 75720337, 246828631, 311570567, 387873563, 404378821, 1727800417, 2715114941, 19005804587]

約数ペア:

[(1, 19005804587), (7, 2715114941), (11, 1727800417), (47, 404378821), (49, 387873563), (61, 311570567), (77, 246828631), (251, 75720337), (329, 57768403), (343, 55410509), (427, 44510081), (517, 36761711), (539, 35261233), (671, 28324597), (1757, 10817191), (2303, 8252629), (2401, 7915787), (2761, 6883667), (2867, 6629161), (2989, 6358583), (3619, 5251673), (3773, 5037319), (4697, 4046371), (11797, 1611071), (12299, 1545313), (15311, 1241317), (16121, 1178947), (19327, 983381), (20069, 947023), (20923, 908369), (25333, 750239), (26411, 719617), (31537, 602651), (32879, 578053), (82579, 230153), (86093, 220759), (107177, 177331), (112847, 168421), (129767, 146461), (135289, 140483)]