18390775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{797}}^1$

素因数の和:891

約数の個数: 24

約数和(自身を含む): 24935904

約数和(自身を除く): 6545129

約数列:

[1, 5, 13, 25, 65, 71, 325, 355, 797, 923, 1775, 3985, 4615, 10361, 19925, 23075, 51805, 56587, 259025, 282935, 735631, 1414675, 3678155, 18390775]

約数ペア:

[(1, 18390775), (5, 3678155), (13, 1414675), (25, 735631), (65, 282935), (71, 259025), (325, 56587), (355, 51805), (797, 23075), (923, 19925), (1775, 10361), (3985, 4615)]