21279447

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{6373}}^1$

素因数の和:6439

約数の個数: 24

約数和(自身を含む): 35796384

約数和(自身を除く): 14516937

約数列:

[1, 3, 7, 9, 21, 53, 63, 159, 371, 477, 1113, 3339, 6373, 19119, 44611, 57357, 133833, 337769, 401499, 1013307, 2364383, 3039921, 7093149, 21279447]

約数ペア:

[(1, 21279447), (3, 7093149), (7, 3039921), (9, 2364383), (21, 1013307), (53, 401499), (63, 337769), (159, 133833), (371, 57357), (477, 44611), (1113, 19119), (3339, 6373)]