20784904

素因数分解:

$2^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{149}}^1$

素因数の和:262

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 25871096

約数列:

[1, 2, 4, 7, 8, 14, 28, 47, 53, 56, 94, 106, 149, 188, 212, 298, 329, 371, 376, 424, 596, 658, 742, 1043, 1192, 1316, 1484, 2086, 2491, 2632, 2968, 4172, 4982, 7003, 7897, 8344, 9964, 14006, 15794, 17437, 19928, 28012, 31588, 34874, 49021, 55279, 56024, 63176, 69748, 98042, 110558, 139496, 196084, 221116, 371159, 392168, 442232, 742318, 1484636, 2598113, 2969272, 5196226, 10392452, 20784904]

約数ペア:

[(1, 20784904), (2, 10392452), (4, 5196226), (7, 2969272), (8, 2598113), (14, 1484636), (28, 742318), (47, 442232), (53, 392168), (56, 371159), (94, 221116), (106, 196084), (149, 139496), (188, 110558), (212, 98042), (298, 69748), (329, 63176), (371, 56024), (376, 55279), (424, 49021), (596, 34874), (658, 31588), (742, 28012), (1043, 19928), (1192, 17437), (1316, 15794), (1484, 14006), (2086, 9964), (2491, 8344), (2632, 7897), (2968, 7003), (4172, 4982)]