20181904

素因数分解:

$2^4\times {\mathrm{631}}^1\times {\mathrm{1999}}^1$

素因数の和:2638

約数の個数: 20

約数和(自身を含む): 39184000

約数和(自身を除く): 19002096

約数列:

[1, 2, 4, 8, 16, 631, 1262, 1999, 2524, 3998, 5048, 7996, 10096, 15992, 31984, 1261369, 2522738, 5045476, 10090952, 20181904]

約数ペア:

[(1, 20181904), (2, 10090952), (4, 5045476), (8, 2522738), (16, 1261369), (631, 31984), (1262, 15992), (1999, 10096), (2524, 7996), (3998, 5048)]