20689697

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^2\times {\mathrm{127}}^1$

素因数の和:225

約数の個数: 24

約数和(自身を含む): 25933824

約数和(自身を除く): 5244127

約数列:

[1, 7, 17, 37, 119, 127, 259, 629, 889, 1369, 2159, 4403, 4699, 9583, 15113, 23273, 32893, 79883, 162911, 173863, 559181, 1217041, 2955671, 20689697]

約数ペア:

[(1, 20689697), (7, 2955671), (17, 1217041), (37, 559181), (119, 173863), (127, 162911), (259, 79883), (629, 32893), (889, 23273), (1369, 15113), (2159, 9583), (4403, 4699)]