19985440

素因数分解:

$2^5\times 5^1\times {\mathrm{124909}}^1$

素因数の和:124924

約数の個数: 24

約数和(自身を含む): 47215980

約数和(自身を除く): 27230540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 124909, 249818, 499636, 624545, 999272, 1249090, 1998544, 2498180, 3997088, 4996360, 9992720, 19985440]

約数ペア:

[(1, 19985440), (2, 9992720), (4, 4996360), (5, 3997088), (8, 2498180), (10, 1998544), (16, 1249090), (20, 999272), (32, 624545), (40, 499636), (80, 249818), (160, 124909)]