21780704

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1439}}^1$

素因数の和:1503

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 26119456

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 43, 44, 86, 88, 172, 176, 344, 352, 473, 688, 946, 1376, 1439, 1892, 2878, 3784, 5756, 7568, 11512, 15136, 15829, 23024, 31658, 46048, 61877, 63316, 123754, 126632, 247508, 253264, 495016, 506528, 680647, 990032, 1361294, 1980064, 2722588, 5445176, 10890352, 21780704]

約数ペア:

[(1, 21780704), (2, 10890352), (4, 5445176), (8, 2722588), (11, 1980064), (16, 1361294), (22, 990032), (32, 680647), (43, 506528), (44, 495016), (86, 253264), (88, 247508), (172, 126632), (176, 123754), (344, 63316), (352, 61877), (473, 46048), (688, 31658), (946, 23024), (1376, 15829), (1439, 15136), (1892, 11512), (2878, 7568), (3784, 5756)]