20510721

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1741}}^1$

素因数の和:1782

約数の個数: 48

約数和(自身を含む): 39132288

約数和(自身を除く): 18621567

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 51, 63, 77, 99, 119, 153, 187, 231, 357, 561, 693, 1071, 1309, 1683, 1741, 3927, 5223, 11781, 12187, 15669, 19151, 29597, 36561, 57453, 88791, 109683, 134057, 172359, 207179, 266373, 325567, 402171, 621537, 976701, 1206513, 1864611, 2278969, 2930103, 6836907, 20510721]

約数ペア:

[(1, 20510721), (3, 6836907), (7, 2930103), (9, 2278969), (11, 1864611), (17, 1206513), (21, 976701), (33, 621537), (51, 402171), (63, 325567), (77, 266373), (99, 207179), (119, 172359), (153, 134057), (187, 109683), (231, 88791), (357, 57453), (561, 36561), (693, 29597), (1071, 19151), (1309, 15669), (1683, 12187), (1741, 11781), (3927, 5223)]