1991231165

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{307}}^1\times {\mathrm{991}}^1$

素因数の和:1338

約数の個数: 64

約数和(自身を含む): 3167797248

約数和(自身を除く): 1176566083

約数列:

[1, 5, 7, 11, 17, 35, 55, 77, 85, 119, 187, 307, 385, 595, 935, 991, 1309, 1535, 2149, 3377, 4955, 5219, 6545, 6937, 10745, 10901, 16847, 16885, 23639, 26095, 34685, 36533, 54505, 57409, 76307, 84235, 117929, 118195, 182665, 185317, 287045, 304237, 381535, 401863, 589645, 926585, 1297219, 1521185, 2009315, 2129659, 3346607, 5172029, 6486095, 10648295, 16733035, 23426249, 25860145, 36204203, 56892319, 117131245, 181021015, 284461595, 398246233, 1991231165]

約数ペア:

[(1, 1991231165), (5, 398246233), (7, 284461595), (11, 181021015), (17, 117131245), (35, 56892319), (55, 36204203), (77, 25860145), (85, 23426249), (119, 16733035), (187, 10648295), (307, 6486095), (385, 5172029), (595, 3346607), (935, 2129659), (991, 2009315), (1309, 1521185), (1535, 1297219), (2149, 926585), (3377, 589645), (4955, 401863), (5219, 381535), (6545, 304237), (6937, 287045), (10745, 185317), (10901, 182665), (16847, 118195), (16885, 117929), (23639, 84235), (26095, 76307), (34685, 57409), (36533, 54505)]