20718368

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{829}}^1$

素因数の和:921

約数の個数: 48

約数和(自身を含む): 45178560

約数和(自身を除く): 24460192

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 71, 88, 142, 176, 284, 352, 568, 781, 829, 1136, 1562, 1658, 2272, 3124, 3316, 6248, 6632, 9119, 12496, 13264, 18238, 24992, 26528, 36476, 58859, 72952, 117718, 145904, 235436, 291808, 470872, 647449, 941744, 1294898, 1883488, 2589796, 5179592, 10359184, 20718368]

約数ペア:

[(1, 20718368), (2, 10359184), (4, 5179592), (8, 2589796), (11, 1883488), (16, 1294898), (22, 941744), (32, 647449), (44, 470872), (71, 291808), (88, 235436), (142, 145904), (176, 117718), (284, 72952), (352, 58859), (568, 36476), (781, 26528), (829, 24992), (1136, 18238), (1562, 13264), (1658, 12496), (2272, 9119), (3124, 6632), (3316, 6248)]