20947280

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{9029}}^1$

素因数の和:9071

約数の個数: 40

約数和(自身を含む): 50387400

約数和(自身を除く): 29440120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 9029, 18058, 36116, 45145, 72232, 90290, 144464, 180580, 261841, 361160, 523682, 722320, 1047364, 1309205, 2094728, 2618410, 4189456, 5236820, 10473640, 20947280]

約数ペア:

[(1, 20947280), (2, 10473640), (4, 5236820), (5, 4189456), (8, 2618410), (10, 2094728), (16, 1309205), (20, 1047364), (29, 722320), (40, 523682), (58, 361160), (80, 261841), (116, 180580), (145, 144464), (232, 90290), (290, 72232), (464, 45145), (580, 36116), (1160, 18058), (2320, 9029)]