21000984016

素因数分解:

$2^4\times {\mathrm{181}}^1\times {\mathrm{7251721}}^1$

素因数の和:7251910

約数の個数: 20

約数和(自身を含む): 40914215524

約数和(自身を除く): 19913231508

約数列:

[1, 2, 4, 8, 16, 181, 362, 724, 1448, 2896, 7251721, 14503442, 29006884, 58013768, 116027536, 1312561501, 2625123002, 5250246004, 10500492008, 21000984016]

約数ペア:

[(1, 21000984016), (2, 10500492008), (4, 5250246004), (8, 2625123002), (16, 1312561501), (181, 116027536), (362, 58013768), (724, 29006884), (1448, 14503442), (2896, 7251721)]