19978497

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{227}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 36421632

約数和(自身を除く): 16443135

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 127, 227, 231, 381, 681, 693, 889, 1143, 1397, 1589, 2043, 2497, 2667, 4191, 4767, 7491, 8001, 9779, 12573, 14301, 17479, 22473, 28829, 29337, 52437, 86487, 88011, 157311, 201803, 259461, 317119, 605409, 951357, 1816227, 2219833, 2854071, 6659499, 19978497]

約数ペア:

[(1, 19978497), (3, 6659499), (7, 2854071), (9, 2219833), (11, 1816227), (21, 951357), (33, 605409), (63, 317119), (77, 259461), (99, 201803), (127, 157311), (227, 88011), (231, 86487), (381, 52437), (681, 29337), (693, 28829), (889, 22473), (1143, 17479), (1397, 14301), (1589, 12573), (2043, 9779), (2497, 8001), (2667, 7491), (4191, 4767)]