21086487

素因数分解:

$3^4\times {\mathrm{439}}^1\times {\mathrm{593}}^1$

素因数の和:1044

約数の個数: 20

約数和(自身を含む): 31624560

約数和(自身を除く): 10538073

約数列:

[1, 3, 9, 27, 81, 439, 593, 1317, 1779, 3951, 5337, 11853, 16011, 35559, 48033, 260327, 780981, 2342943, 7028829, 21086487]

約数ペア:

[(1, 21086487), (3, 7028829), (9, 2342943), (27, 780981), (81, 260327), (439, 48033), (593, 35559), (1317, 16011), (1779, 11853), (3951, 5337)]