128005975

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{331}}^1\times {\mathrm{499}}^1$

素因数の和:871

約数の個数: 24

約数和(自身を含む): 164672000

約数和(自身を除く): 36666025

約数列:

[1, 5, 25, 31, 155, 331, 499, 775, 1655, 2495, 8275, 10261, 12475, 15469, 51305, 77345, 165169, 256525, 386725, 825845, 4129225, 5120239, 25601195, 128005975]

約数ペア:

[(1, 128005975), (5, 25601195), (25, 5120239), (31, 4129225), (155, 825845), (331, 386725), (499, 256525), (775, 165169), (1655, 77345), (2495, 51305), (8275, 15469), (10261, 12475)]