18218996887

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1082

約数の個数: 80

約数和(自身を含む): 24896184320

約数和(自身を除く): 6677187433

約数列:

[1, 7, 13, 19, 31, 49, 91, 133, 217, 247, 343, 403, 589, 637, 931, 991, 1519, 1729, 2401, 2821, 4123, 4459, 6517, 6937, 7657, 10633, 12103, 12883, 18829, 19747, 28861, 30721, 31213, 45619, 48559, 53599, 74431, 84721, 90181, 131803, 138229, 202027, 215047, 244777, 339913, 375193, 399373, 583699, 593047, 631267, 922621, 967603, 1414189, 1505329, 1713439, 2379391, 2626351, 2795611, 4085893, 4418869, 6458347, 7588087, 10537303, 11994073, 18384457, 19569277, 28601251, 30932083, 45208429, 53116609, 73761121, 83958511, 136984939, 200208757, 371816263, 587709577, 958894573, 1401461299, 2602713841, 18218996887]

約数ペア:

[(1, 18218996887), (7, 2602713841), (13, 1401461299), (19, 958894573), (31, 587709577), (49, 371816263), (91, 200208757), (133, 136984939), (217, 83958511), (247, 73761121), (343, 53116609), (403, 45208429), (589, 30932083), (637, 28601251), (931, 19569277), (991, 18384457), (1519, 11994073), (1729, 10537303), (2401, 7588087), (2821, 6458347), (4123, 4418869), (4459, 4085893), (6517, 2795611), (6937, 2626351), (7657, 2379391), (10633, 1713439), (12103, 1505329), (12883, 1414189), (18829, 967603), (19747, 922621), (28861, 631267), (30721, 593047), (31213, 583699), (45619, 399373), (48559, 375193), (53599, 339913), (74431, 244777), (84721, 215047), (90181, 202027), (131803, 138229)]