855140140

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{691}}^1\times {\mathrm{1439}}^1$

素因数の和:2182

約数の個数: 48

約数和(自身を含む): 1841495040

約数和(自身を除く): 986354900

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 691, 860, 1382, 1439, 2764, 2878, 3455, 5756, 6910, 7195, 13820, 14390, 28780, 29713, 59426, 61877, 118852, 123754, 148565, 247508, 297130, 309385, 594260, 618770, 994349, 1237540, 1988698, 3977396, 4971745, 9943490, 19886980, 42757007, 85514014, 171028028, 213785035, 427570070, 855140140]

約数ペア:

[(1, 855140140), (2, 427570070), (4, 213785035), (5, 171028028), (10, 85514014), (20, 42757007), (43, 19886980), (86, 9943490), (172, 4971745), (215, 3977396), (430, 1988698), (691, 1237540), (860, 994349), (1382, 618770), (1439, 594260), (2764, 309385), (2878, 297130), (3455, 247508), (5756, 148565), (6910, 123754), (7195, 118852), (13820, 61877), (14390, 59426), (28780, 29713)]