21491260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153509}}^1$

素因数の和:153525

約数の個数: 24

約数和(自身を含む): 51579360

約数和(自身を除く): 30088100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153509, 307018, 614036, 767545, 1074563, 1535090, 2149126, 3070180, 4298252, 5372815, 10745630, 21491260]

約数ペア:

[(1, 21491260), (2, 10745630), (4, 5372815), (5, 4298252), (7, 3070180), (10, 2149126), (14, 1535090), (20, 1074563), (28, 767545), (35, 614036), (70, 307018), (140, 153509)]