21891723

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{349}}^1$

素因数の和:491

約数の個数: 32

約数和(自身を含む): 34944000

約数和(自身を除く): 13052277

約数列:

[1, 3, 7, 21, 29, 87, 103, 203, 309, 349, 609, 721, 1047, 2163, 2443, 2987, 7329, 8961, 10121, 20909, 30363, 35947, 62727, 70847, 107841, 212541, 251629, 754887, 1042463, 3127389, 7297241, 21891723]

約数ペア:

[(1, 21891723), (3, 7297241), (7, 3127389), (21, 1042463), (29, 754887), (87, 251629), (103, 212541), (203, 107841), (309, 70847), (349, 62727), (609, 35947), (721, 30363), (1047, 20909), (2163, 10121), (2443, 8961), (2987, 7329)]