20381984

素因数分解:

$2^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4789}}^1$

素因数の和:4825

約数の個数: 48

約数和(自身を含む): 48283200

約数和(自身を除く): 27901216

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 32, 38, 56, 76, 112, 133, 152, 224, 266, 304, 532, 608, 1064, 2128, 4256, 4789, 9578, 19156, 33523, 38312, 67046, 76624, 90991, 134092, 153248, 181982, 268184, 363964, 536368, 636937, 727928, 1072736, 1273874, 1455856, 2547748, 2911712, 5095496, 10190992, 20381984]

約数ペア:

[(1, 20381984), (2, 10190992), (4, 5095496), (7, 2911712), (8, 2547748), (14, 1455856), (16, 1273874), (19, 1072736), (28, 727928), (32, 636937), (38, 536368), (56, 363964), (76, 268184), (112, 181982), (133, 153248), (152, 134092), (224, 90991), (266, 76624), (304, 67046), (532, 38312), (608, 33523), (1064, 19156), (2128, 9578), (4256, 4789)]