21979725

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{17239}}^1$

素因数の和:17269

約数の個数: 24

約数和(自身を含む): 38479680

約数和(自身を除く): 16499955

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 17239, 51717, 86195, 258585, 293063, 430975, 879189, 1292925, 1465315, 4395945, 7326575, 21979725]

約数ペア:

[(1, 21979725), (3, 7326575), (5, 4395945), (15, 1465315), (17, 1292925), (25, 879189), (51, 430975), (75, 293063), (85, 258585), (255, 86195), (425, 51717), (1275, 17239)]