20781747

素因数分解:

$3^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{5591}}^1$

素因数の和:5663

約数の個数: 24

約数和(自身を含む): 34894080

約数和(自身を除く): 14112333

約数列:

[1, 3, 7, 9, 21, 59, 63, 177, 413, 531, 1239, 3717, 5591, 16773, 39137, 50319, 117411, 329869, 352233, 989607, 2309083, 2968821, 6927249, 20781747]

約数ペア:

[(1, 20781747), (3, 6927249), (7, 2968821), (9, 2309083), (21, 989607), (59, 352233), (63, 329869), (177, 117411), (413, 50319), (531, 39137), (1239, 16773), (3717, 5591)]