20849625

素因数分解:

$3^2\times 5^3\times {\mathrm{43}}^1\times {\mathrm{431}}^1$

素因数の和:495

約数の個数: 48

約数和(自身を含む): 38548224

約数和(自身を除く): 17698599

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 125, 129, 215, 225, 375, 387, 431, 645, 1075, 1125, 1293, 1935, 2155, 3225, 3879, 5375, 6465, 9675, 10775, 16125, 18533, 19395, 32325, 48375, 53875, 55599, 92665, 96975, 161625, 166797, 277995, 463325, 484875, 833985, 1389975, 2316625, 4169925, 6949875, 20849625]

約数ペア:

[(1, 20849625), (3, 6949875), (5, 4169925), (9, 2316625), (15, 1389975), (25, 833985), (43, 484875), (45, 463325), (75, 277995), (125, 166797), (129, 161625), (215, 96975), (225, 92665), (375, 55599), (387, 53875), (431, 48375), (645, 32325), (1075, 19395), (1125, 18533), (1293, 16125), (1935, 10775), (2155, 9675), (3225, 6465), (3879, 5375)]