638937

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1$

素因数の和:189

約数の個数: 24

約数和(自身を含む): 1025024

約数和(自身を除く): 386087

約数列:

[1, 3, 9, 13, 39, 43, 117, 127, 129, 381, 387, 559, 1143, 1651, 1677, 4953, 5031, 5461, 14859, 16383, 49149, 70993, 212979, 638937]

約数ペア:

[(1, 638937), (3, 212979), (9, 70993), (13, 49149), (39, 16383), (43, 14859), (117, 5461), (127, 5031), (129, 4953), (381, 1677), (387, 1651), (559, 1143)]