21199899

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{4973}}^1$

素因数の和:5019

約数の個数: 24

約数和(自身を含む): 34022160

約数和(自身を除く): 12822261

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 4973, 14919, 34811, 104433, 144217, 243677, 432651, 731031, 1009519, 3028557, 7066633, 21199899]

約数ペア:

[(1, 21199899), (3, 7066633), (7, 3028557), (21, 1009519), (29, 731031), (49, 432651), (87, 243677), (147, 144217), (203, 104433), (609, 34811), (1421, 14919), (4263, 4973)]