20774481

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{1553}}^1$

素因数の和:1590

約数の個数: 32

約数和(自身を含む): 34809600

約数和(自身を除く): 14035119

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 343, 637, 1029, 1553, 1911, 4459, 4659, 10871, 13377, 20189, 32613, 60567, 76097, 141323, 228291, 423969, 532679, 989261, 1598037, 2967783, 6924827, 20774481]

約数ペア:

[(1, 20774481), (3, 6924827), (7, 2967783), (13, 1598037), (21, 989261), (39, 532679), (49, 423969), (91, 228291), (147, 141323), (273, 76097), (343, 60567), (637, 32613), (1029, 20189), (1553, 13377), (1911, 10871), (4459, 4659)]