21839792

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{104999}}^1$

素因数の和:105020

約数の個数: 20

約数和(自身を含む): 45570000

約数和(自身を除く): 23730208

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 104999, 209998, 419996, 839992, 1364987, 1679984, 2729974, 5459948, 10919896, 21839792]

約数ペア:

[(1, 21839792), (2, 10919896), (4, 5459948), (8, 2729974), (13, 1679984), (16, 1364987), (26, 839992), (52, 419996), (104, 209998), (208, 104999)]