81340640

素因数分解:

$2^5\times 5^1\times {\mathrm{263}}^1\times {\mathrm{1933}}^1$

素因数の和:2211

約数の個数: 48

約数和(自身を含む): 192997728

約数和(自身を除く): 111657088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 263, 526, 1052, 1315, 1933, 2104, 2630, 3866, 4208, 5260, 7732, 8416, 9665, 10520, 15464, 19330, 21040, 30928, 38660, 42080, 61856, 77320, 154640, 309280, 508379, 1016758, 2033516, 2541895, 4067032, 5083790, 8134064, 10167580, 16268128, 20335160, 40670320, 81340640]

約数ペア:

[(1, 81340640), (2, 40670320), (4, 20335160), (5, 16268128), (8, 10167580), (10, 8134064), (16, 5083790), (20, 4067032), (32, 2541895), (40, 2033516), (80, 1016758), (160, 508379), (263, 309280), (526, 154640), (1052, 77320), (1315, 61856), (1933, 42080), (2104, 38660), (2630, 30928), (3866, 21040), (4208, 19330), (5260, 15464), (7732, 10520), (8416, 9665)]