15625025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{367}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 21081984

約数和(自身を除く): 5456959

約数列:

[1, 5, 13, 25, 65, 131, 325, 367, 655, 1703, 1835, 3275, 4771, 8515, 9175, 23855, 42575, 48077, 119275, 240385, 625001, 1201925, 3125005, 15625025]

約数ペア:

[(1, 15625025), (5, 3125005), (13, 1201925), (25, 625001), (65, 240385), (131, 119275), (325, 48077), (367, 42575), (655, 23855), (1703, 9175), (1835, 8515), (3275, 4771)]