19916988

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:124

約数の個数: 144

約数和(自身を含む): 60996096

約数和(自身を除く): 41079108

約数列:

[1, 2, 3, 4, 6, 7, 12, 13, 14, 21, 23, 26, 28, 39, 42, 46, 52, 61, 69, 78, 84, 91, 92, 122, 138, 156, 161, 169, 182, 183, 244, 273, 276, 299, 322, 338, 364, 366, 427, 483, 507, 546, 598, 644, 676, 732, 793, 854, 897, 966, 1014, 1092, 1183, 1196, 1281, 1403, 1586, 1708, 1794, 1932, 2028, 2093, 2366, 2379, 2562, 2806, 3172, 3549, 3588, 3887, 4186, 4209, 4732, 4758, 5124, 5551, 5612, 6279, 7098, 7774, 8372, 8418, 9516, 9821, 10309, 11102, 11661, 12558, 14196, 15548, 16653, 16836, 18239, 19642, 20618, 22204, 23322, 25116, 27209, 29463, 30927, 33306, 36478, 39284, 41236, 46644, 54418, 54717, 58926, 61854, 66612, 72163, 72956, 81627, 108836, 109434, 117852, 123708, 127673, 144326, 163254, 216489, 218868, 237107, 255346, 288652, 326508, 383019, 432978, 474214, 510692, 711321, 766038, 865956, 948428, 1422642, 1532076, 1659749, 2845284, 3319498, 4979247, 6638996, 9958494, 19916988]

約数ペア:

[(1, 19916988), (2, 9958494), (3, 6638996), (4, 4979247), (6, 3319498), (7, 2845284), (12, 1659749), (13, 1532076), (14, 1422642), (21, 948428), (23, 865956), (26, 766038), (28, 711321), (39, 510692), (42, 474214), (46, 432978), (52, 383019), (61, 326508), (69, 288652), (78, 255346), (84, 237107), (91, 218868), (92, 216489), (122, 163254), (138, 144326), (156, 127673), (161, 123708), (169, 117852), (182, 109434), (183, 108836), (244, 81627), (273, 72956), (276, 72163), (299, 66612), (322, 61854), (338, 58926), (364, 54717), (366, 54418), (427, 46644), (483, 41236), (507, 39284), (546, 36478), (598, 33306), (644, 30927), (676, 29463), (732, 27209), (793, 25116), (854, 23322), (897, 22204), (966, 20618), (1014, 19642), (1092, 18239), (1183, 16836), (1196, 16653), (1281, 15548), (1403, 14196), (1586, 12558), (1708, 11661), (1794, 11102), (1932, 10309), (2028, 9821), (2093, 9516), (2366, 8418), (2379, 8372), (2562, 7774), (2806, 7098), (3172, 6279), (3549, 5612), (3588, 5551), (3887, 5124), (4186, 4758), (4209, 4732)]