20777393

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 27498240

約数和(自身を除く): 6720847

約数列:

[1, 7, 13, 19, 61, 91, 133, 197, 247, 427, 793, 1159, 1379, 1729, 2561, 3743, 5551, 8113, 12017, 15067, 17927, 26201, 48659, 84119, 105469, 156221, 228323, 340613, 1093547, 1598261, 2968199, 20777393]

約数ペア:

[(1, 20777393), (7, 2968199), (13, 1598261), (19, 1093547), (61, 340613), (91, 228323), (133, 156221), (197, 105469), (247, 84119), (427, 48659), (793, 26201), (1159, 17927), (1379, 15067), (1729, 12017), (2561, 8113), (3743, 5551)]