638304639

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{8039}}^1$

素因数の和:8267

約数の個数: 32

約数和(自身を含む): 1029120000

約数和(自身を除く): 390815361

約数列:

[1, 3, 7, 19, 21, 57, 133, 199, 399, 597, 1393, 3781, 4179, 8039, 11343, 24117, 26467, 56273, 79401, 152741, 168819, 458223, 1069187, 1599761, 3207561, 4799283, 11198327, 30395459, 33594981, 91186377, 212768213, 638304639]

約数ペア:

[(1, 638304639), (3, 212768213), (7, 91186377), (19, 33594981), (21, 30395459), (57, 11198327), (133, 4799283), (199, 3207561), (399, 1599761), (597, 1069187), (1393, 458223), (3781, 168819), (4179, 152741), (8039, 79401), (11343, 56273), (24117, 26467)]