19997586

素因数分解:

$2^1\times 3^2\times 7^3\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 52416000

約数和(自身を除く): 32418414

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 41, 42, 49, 63, 79, 82, 98, 123, 126, 147, 158, 237, 246, 287, 294, 343, 369, 441, 474, 553, 574, 686, 711, 738, 861, 882, 1029, 1106, 1422, 1659, 1722, 2009, 2058, 2583, 3087, 3239, 3318, 3871, 4018, 4977, 5166, 6027, 6174, 6478, 7742, 9717, 9954, 11613, 12054, 14063, 18081, 19434, 22673, 23226, 27097, 28126, 29151, 34839, 36162, 42189, 45346, 54194, 58302, 68019, 69678, 81291, 84378, 126567, 136038, 158711, 162582, 204057, 243873, 253134, 317422, 408114, 476133, 487746, 952266, 1110977, 1428399, 2221954, 2856798, 3332931, 6665862, 9998793, 19997586]

約数ペア:

[(1, 19997586), (2, 9998793), (3, 6665862), (6, 3332931), (7, 2856798), (9, 2221954), (14, 1428399), (18, 1110977), (21, 952266), (41, 487746), (42, 476133), (49, 408114), (63, 317422), (79, 253134), (82, 243873), (98, 204057), (123, 162582), (126, 158711), (147, 136038), (158, 126567), (237, 84378), (246, 81291), (287, 69678), (294, 68019), (343, 58302), (369, 54194), (441, 45346), (474, 42189), (553, 36162), (574, 34839), (686, 29151), (711, 28126), (738, 27097), (861, 23226), (882, 22673), (1029, 19434), (1106, 18081), (1422, 14063), (1659, 12054), (1722, 11613), (2009, 9954), (2058, 9717), (2583, 7742), (3087, 6478), (3239, 6174), (3318, 6027), (3871, 5166), (4018, 4977)]