21987639

素因数分解:

$3^3\times {\mathrm{503}}^1\times {\mathrm{1619}}^1$

素因数の和:2131

約数の個数: 16

約数和(自身を含む): 32659200

約数和(自身を除く): 10671561

約数列:

[1, 3, 9, 27, 503, 1509, 1619, 4527, 4857, 13581, 14571, 43713, 814357, 2443071, 7329213, 21987639]

約数ペア:

[(1, 21987639), (3, 7329213), (9, 2443071), (27, 814357), (503, 43713), (1509, 14571), (1619, 13581), (4527, 4857)]