21000585968

素因数分解:

$2^4\times {\mathrm{1601}}^1\times {\mathrm{819823}}^1$

素因数の和:821432

約数の個数: 20

約数和(自身を含む): 40714099488

約数和(自身を除く): 19713513520

約数列:

[1, 2, 4, 8, 16, 1601, 3202, 6404, 12808, 25616, 819823, 1639646, 3279292, 6558584, 13117168, 1312536623, 2625073246, 5250146492, 10500292984, 21000585968]

約数ペア:

[(1, 21000585968), (2, 10500292984), (4, 5250146492), (8, 2625073246), (16, 1312536623), (1601, 13117168), (3202, 6558584), (6404, 3279292), (12808, 1639646), (25616, 819823)]