28144720

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{2531}}^1$

素因数の和:2683

約数の個数: 40

約数和(自身を含む): 65933280

約数和(自身を除く): 37788560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 2224, 2531, 2780, 5062, 5560, 10124, 11120, 12655, 20248, 25310, 40496, 50620, 101240, 202480, 351809, 703618, 1407236, 1759045, 2814472, 3518090, 5628944, 7036180, 14072360, 28144720]

約数ペア:

[(1, 28144720), (2, 14072360), (4, 7036180), (5, 5628944), (8, 3518090), (10, 2814472), (16, 1759045), (20, 1407236), (40, 703618), (80, 351809), (139, 202480), (278, 101240), (556, 50620), (695, 40496), (1112, 25310), (1390, 20248), (2224, 12655), (2531, 11120), (2780, 10124), (5062, 5560)]