205489280

素因数分解:

$2^7\times 5^1\times {\mathrm{321077}}^1$

素因数の和:321096

約数の個数: 32

約数和(自身を含む): 491249340

約数和(自身を除く): 285760060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 321077, 642154, 1284308, 1605385, 2568616, 3210770, 5137232, 6421540, 10274464, 12843080, 20548928, 25686160, 41097856, 51372320, 102744640, 205489280]

約数ペア:

[(1, 205489280), (2, 102744640), (4, 51372320), (5, 41097856), (8, 25686160), (10, 20548928), (16, 12843080), (20, 10274464), (32, 6421540), (40, 5137232), (64, 3210770), (80, 2568616), (128, 1605385), (160, 1284308), (320, 642154), (640, 321077)]