18915939

素因数分解:

$3^2\times 7^1\times {\mathrm{211}}^1\times {\mathrm{1423}}^1$

素因数の和:1647

約数の個数: 24

約数和(自身を含む): 31396352

約数和(自身を除く): 12480413

約数列:

[1, 3, 7, 9, 21, 63, 211, 633, 1423, 1477, 1899, 4269, 4431, 9961, 12807, 13293, 29883, 89649, 300253, 900759, 2101771, 2702277, 6305313, 18915939]

約数ペア:

[(1, 18915939), (3, 6305313), (7, 2702277), (9, 2101771), (21, 900759), (63, 300253), (211, 89649), (633, 29883), (1423, 13293), (1477, 12807), (1899, 9961), (4269, 4431)]