20681235

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6473}}^1$

素因数の和:6555

約数の個数: 24

約数和(自身を含む): 36357984

約数和(自身を除く): 15676749

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6473, 19419, 32365, 58257, 97095, 291285, 459583, 1378749, 2297915, 4136247, 6893745, 20681235]

約数ペア:

[(1, 20681235), (3, 6893745), (5, 4136247), (9, 2297915), (15, 1378749), (45, 459583), (71, 291285), (213, 97095), (355, 58257), (639, 32365), (1065, 19419), (3195, 6473)]