21000907984

素因数分解:

$2^4\times 7^1\times {\mathrm{187508107}}^1$

素因数の和:187508122

約数の個数: 20

約数和(自身を含む): 46502010784

約数和(自身を除く): 25501102800

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 187508107, 375016214, 750032428, 1312556749, 1500064856, 2625113498, 3000129712, 5250226996, 10500453992, 21000907984]

約数ペア:

[(1, 21000907984), (2, 10500453992), (4, 5250226996), (7, 3000129712), (8, 2625113498), (14, 1500064856), (16, 1312556749), (28, 750032428), (56, 375016214), (112, 187508107)]