20525375

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{743}}^1$

素因数の和:788

約数の個数: 32

約数和(自身を含む): 29248128

約数和(自身を除く): 8722753

約数列:

[1, 5, 13, 17, 25, 65, 85, 125, 221, 325, 425, 743, 1105, 1625, 2125, 3715, 5525, 9659, 12631, 18575, 27625, 48295, 63155, 92875, 164203, 241475, 315775, 821015, 1207375, 1578875, 4105075, 20525375]

約数ペア:

[(1, 20525375), (5, 4105075), (13, 1578875), (17, 1207375), (25, 821015), (65, 315775), (85, 241475), (125, 164203), (221, 92875), (325, 63155), (425, 48295), (743, 27625), (1105, 18575), (1625, 12631), (2125, 9659), (3715, 5525)]