18863919

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{557}}^1$

素因数の和:687

約数の個数: 24

約数和(自身を含む): 28203552

約数和(自身を除く): 9339633

約数列:

[1, 3, 9, 53, 71, 159, 213, 477, 557, 639, 1671, 3763, 5013, 11289, 29521, 33867, 39547, 88563, 118641, 265689, 355923, 2095991, 6287973, 18863919]

約数ペア:

[(1, 18863919), (3, 6287973), (9, 2095991), (53, 355923), (71, 265689), (159, 118641), (213, 88563), (477, 39547), (557, 33867), (639, 29521), (1671, 11289), (3763, 5013)]