20716875

素因数分解:

$3^2\times 5^4\times {\mathrm{29}}^1\times {\mathrm{127}}^1$

素因数の和:182

約数の個数: 60

約数和(自身を含む): 38987520

約数和(自身を除く): 18270645

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 125, 127, 145, 225, 261, 375, 381, 435, 625, 635, 725, 1125, 1143, 1305, 1875, 1905, 2175, 3175, 3625, 3683, 5625, 5715, 6525, 9525, 10875, 11049, 15875, 18125, 18415, 28575, 32625, 33147, 47625, 54375, 55245, 79375, 92075, 142875, 163125, 165735, 238125, 276225, 460375, 714375, 828675, 1381125, 2301875, 4143375, 6905625, 20716875]

約数ペア:

[(1, 20716875), (3, 6905625), (5, 4143375), (9, 2301875), (15, 1381125), (25, 828675), (29, 714375), (45, 460375), (75, 276225), (87, 238125), (125, 165735), (127, 163125), (145, 142875), (225, 92075), (261, 79375), (375, 55245), (381, 54375), (435, 47625), (625, 33147), (635, 32625), (725, 28575), (1125, 18415), (1143, 18125), (1305, 15875), (1875, 11049), (1905, 10875), (2175, 9525), (3175, 6525), (3625, 5715), (3683, 5625)]