18405999

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{821}}^1$

素因数の和:927

約数の個数: 24

約数和(自身を含む): 27698112

約数和(自身を除く): 9292113

約数列:

[1, 3, 9, 47, 53, 141, 159, 423, 477, 821, 2463, 2491, 7389, 7473, 22419, 38587, 43513, 115761, 130539, 347283, 391617, 2045111, 6135333, 18405999]

約数ペア:

[(1, 18405999), (3, 6135333), (9, 2045111), (47, 391617), (53, 347283), (141, 130539), (159, 115761), (423, 43513), (477, 38587), (821, 22419), (2463, 7473), (2491, 7389)]