19539440

素因数分解:

$2^4\times 5^1\times {\mathrm{244243}}^1$

素因数の和:244256

約数の個数: 20

約数和(自身を含む): 45429384

約数和(自身を除く): 25889944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 244243, 488486, 976972, 1221215, 1953944, 2442430, 3907888, 4884860, 9769720, 19539440]

約数ペア:

[(1, 19539440), (2, 9769720), (4, 4884860), (5, 3907888), (8, 2442430), (10, 1953944), (16, 1221215), (20, 976972), (40, 488486), (80, 244243)]