20123440

素因数分解:

$2^4\times 5^1\times {\mathrm{251543}}^1$

素因数の和:251556

約数の個数: 20

約数和(自身を含む): 46787184

約数和(自身を除く): 26663744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251543, 503086, 1006172, 1257715, 2012344, 2515430, 4024688, 5030860, 10061720, 20123440]

約数ペア:

[(1, 20123440), (2, 10061720), (4, 5030860), (5, 4024688), (8, 2515430), (10, 2012344), (16, 1257715), (20, 1006172), (40, 503086), (80, 251543)]