256543160

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{149153}}^1$

素因数の和:149207

約数の個数: 32

約数和(自身を含む): 590649840

約数和(自身を除く): 334106680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 149153, 298306, 596612, 745765, 1193224, 1491530, 2983060, 5966120, 6413579, 12827158, 25654316, 32067895, 51308632, 64135790, 128271580, 256543160]

約数ペア:

[(1, 256543160), (2, 128271580), (4, 64135790), (5, 51308632), (8, 32067895), (10, 25654316), (20, 12827158), (40, 6413579), (43, 5966120), (86, 2983060), (172, 1491530), (215, 1193224), (344, 745765), (430, 596612), (860, 298306), (1720, 149153)]