21538528

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1423}}^1$

素因数の和:1487

約数の個数: 48

約数和(自身を含む): 47367936

約数和(自身を除く): 25829408

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 43, 44, 86, 88, 172, 176, 344, 352, 473, 688, 946, 1376, 1423, 1892, 2846, 3784, 5692, 7568, 11384, 15136, 15653, 22768, 31306, 45536, 61189, 62612, 122378, 125224, 244756, 250448, 489512, 500896, 673079, 979024, 1346158, 1958048, 2692316, 5384632, 10769264, 21538528]

約数ペア:

[(1, 21538528), (2, 10769264), (4, 5384632), (8, 2692316), (11, 1958048), (16, 1346158), (22, 979024), (32, 673079), (43, 500896), (44, 489512), (86, 250448), (88, 244756), (172, 125224), (176, 122378), (344, 62612), (352, 61189), (473, 45536), (688, 31306), (946, 22768), (1376, 15653), (1423, 15136), (1892, 11384), (2846, 7568), (3784, 5692)]