21092481

素因数分解:

$3^4\times {\mathrm{109}}^1\times {\mathrm{2389}}^1$

素因数の和:2510

約数の個数: 20

約数和(自身を含む): 31810900

約数和(自身を除く): 10718419

約数列:

[1, 3, 9, 27, 81, 109, 327, 981, 2389, 2943, 7167, 8829, 21501, 64503, 193509, 260401, 781203, 2343609, 7030827, 21092481]

約数ペア:

[(1, 21092481), (3, 7030827), (9, 2343609), (27, 781203), (81, 260401), (109, 193509), (327, 64503), (981, 21501), (2389, 8829), (2943, 7167)]