21553287

素因数分解:

$3^1\times 7^2\times {\mathrm{151}}^1\times {\mathrm{971}}^1$

素因数の和:1139

約数の個数: 24

約数和(自身を含む): 33685632

約数和(自身を除く): 12132345

約数列:

[1, 3, 7, 21, 49, 147, 151, 453, 971, 1057, 2913, 3171, 6797, 7399, 20391, 22197, 47579, 142737, 146621, 439863, 1026347, 3079041, 7184429, 21553287]

約数ペア:

[(1, 21553287), (3, 7184429), (7, 3079041), (21, 1026347), (49, 439863), (147, 146621), (151, 142737), (453, 47579), (971, 22197), (1057, 20391), (2913, 7399), (3171, 6797)]