21031569

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19973}}^1$

素因数の和:19998

約数の個数: 20

約数和(自身を含む): 33835956

約数和(自身を除く): 12804387

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 19973, 59919, 179757, 259649, 539271, 778947, 1617813, 2336841, 7010523, 21031569]

約数ペア:

[(1, 21031569), (3, 7010523), (9, 2336841), (13, 1617813), (27, 778947), (39, 539271), (81, 259649), (117, 179757), (351, 59919), (1053, 19973)]