21494960

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1933}}^1$

素因数の和:2085

約数の個数: 40

約数和(自身を含む): 50361360

約数和(自身を除く): 28866400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 1933, 2224, 2780, 3866, 5560, 7732, 9665, 11120, 15464, 19330, 30928, 38660, 77320, 154640, 268687, 537374, 1074748, 1343435, 2149496, 2686870, 4298992, 5373740, 10747480, 21494960]

約数ペア:

[(1, 21494960), (2, 10747480), (4, 5373740), (5, 4298992), (8, 2686870), (10, 2149496), (16, 1343435), (20, 1074748), (40, 537374), (80, 268687), (139, 154640), (278, 77320), (556, 38660), (695, 30928), (1112, 19330), (1390, 15464), (1933, 11120), (2224, 9665), (2780, 7732), (3866, 5560)]