20091440

素因数分解:

$2^4\times 5^1\times {\mathrm{251143}}^1$

素因数の和:251156

約数の個数: 20

約数和(自身を含む): 46712784

約数和(自身を除く): 26621344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251143, 502286, 1004572, 1255715, 2009144, 2511430, 4018288, 5022860, 10045720, 20091440]

約数ペア:

[(1, 20091440), (2, 10045720), (4, 5022860), (5, 4018288), (8, 2511430), (10, 2009144), (16, 1255715), (20, 1004572), (40, 502286), (80, 251143)]