20157788

素因数分解:

$2^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{8089}}^1$

素因数の和:8189

約数の個数: 24

約数和(自身を含む): 40773600

約数和(自身を除く): 20615812

約数列:

[1, 2, 4, 7, 14, 28, 89, 178, 356, 623, 1246, 2492, 8089, 16178, 32356, 56623, 113246, 226492, 719921, 1439842, 2879684, 5039447, 10078894, 20157788]

約数ペア:

[(1, 20157788), (2, 10078894), (4, 5039447), (7, 2879684), (14, 1439842), (28, 719921), (89, 226492), (178, 113246), (356, 56623), (623, 32356), (1246, 16178), (2492, 8089)]