20191984

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{523}}^1$

素因数の和:677

約数の個数: 40

約数和(自身を含む): 41584640

約数和(自身を除く): 21392656

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 127, 152, 254, 304, 508, 523, 1016, 1046, 2032, 2092, 2413, 4184, 4826, 8368, 9652, 9937, 19304, 19874, 38608, 39748, 66421, 79496, 132842, 158992, 265684, 531368, 1062736, 1261999, 2523998, 5047996, 10095992, 20191984]

約数ペア:

[(1, 20191984), (2, 10095992), (4, 5047996), (8, 2523998), (16, 1261999), (19, 1062736), (38, 531368), (76, 265684), (127, 158992), (152, 132842), (254, 79496), (304, 66421), (508, 39748), (523, 38608), (1016, 19874), (1046, 19304), (2032, 9937), (2092, 9652), (2413, 8368), (4184, 4826)]