19897880

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3631}}^1$

素因数の和:3779

約数の個数: 32

約数和(自身を含む): 45109440

約数和(自身を除く): 25211560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3631, 5480, 7262, 14524, 18155, 29048, 36310, 72620, 145240, 497447, 994894, 1989788, 2487235, 3979576, 4974470, 9948940, 19897880]

約数ペア:

[(1, 19897880), (2, 9948940), (4, 4974470), (5, 3979576), (8, 2487235), (10, 1989788), (20, 994894), (40, 497447), (137, 145240), (274, 72620), (548, 36310), (685, 29048), (1096, 18155), (1370, 14524), (2740, 7262), (3631, 5480)]