20687085

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10691}}^1$

素因数の和:10745

約数の個数: 24

約数和(自身を含む): 36694944

約数和(自身を除く): 16007859

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10691, 32073, 53455, 96219, 160365, 459713, 481095, 1379139, 2298565, 4137417, 6895695, 20687085]

約数ペア:

[(1, 20687085), (3, 6895695), (5, 4137417), (9, 2298565), (15, 1379139), (43, 481095), (45, 459713), (129, 160365), (215, 96219), (387, 53455), (645, 32073), (1935, 10691)]