21031829

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{241}}^1$

素因数の和:405

約数の個数: 24

約数和(自身を含む): 26650008

約数和(自身を除く): 5618179

約数列:

[1, 7, 13, 49, 91, 137, 241, 637, 959, 1687, 1781, 3133, 6713, 11809, 12467, 21931, 33017, 87269, 153517, 231119, 429221, 1617833, 3004547, 21031829]

約数ペア:

[(1, 21031829), (7, 3004547), (13, 1617833), (49, 429221), (91, 231119), (137, 153517), (241, 87269), (637, 33017), (959, 21931), (1687, 12467), (1781, 11809), (3133, 6713)]