18505851

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1279}}^1$

素因数の和:1355

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 12459909

約数列:

[1, 3, 7, 13, 21, 39, 53, 91, 159, 273, 371, 689, 1113, 1279, 2067, 3837, 4823, 8953, 14469, 16627, 26859, 49881, 67787, 116389, 203361, 349167, 474509, 881231, 1423527, 2643693, 6168617, 18505851]

約数ペア:

[(1, 18505851), (3, 6168617), (7, 2643693), (13, 1423527), (21, 881231), (39, 474509), (53, 349167), (91, 203361), (159, 116389), (273, 67787), (371, 49881), (689, 26859), (1113, 16627), (1279, 14469), (2067, 8953), (3837, 4823)]