20997912

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{167}}^1$

素因数の和:233

約数の個数: 96

約数和(自身を含む): 59028480

約数和(自身を除く): 38030568

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 31, 39, 52, 62, 78, 93, 104, 124, 156, 167, 169, 186, 248, 312, 334, 338, 372, 403, 501, 507, 668, 676, 744, 806, 1002, 1014, 1209, 1336, 1352, 1612, 2004, 2028, 2171, 2418, 3224, 4008, 4056, 4342, 4836, 5177, 5239, 6513, 8684, 9672, 10354, 10478, 13026, 15531, 15717, 17368, 20708, 20956, 26052, 28223, 31062, 31434, 41416, 41912, 52104, 56446, 62124, 62868, 67301, 84669, 112892, 124248, 125736, 134602, 169338, 201903, 225784, 269204, 338676, 403806, 538408, 677352, 807612, 874913, 1615224, 1749826, 2624739, 3499652, 5249478, 6999304, 10498956, 20997912]

約数ペア:

[(1, 20997912), (2, 10498956), (3, 6999304), (4, 5249478), (6, 3499652), (8, 2624739), (12, 1749826), (13, 1615224), (24, 874913), (26, 807612), (31, 677352), (39, 538408), (52, 403806), (62, 338676), (78, 269204), (93, 225784), (104, 201903), (124, 169338), (156, 134602), (167, 125736), (169, 124248), (186, 112892), (248, 84669), (312, 67301), (334, 62868), (338, 62124), (372, 56446), (403, 52104), (501, 41912), (507, 41416), (668, 31434), (676, 31062), (744, 28223), (806, 26052), (1002, 20956), (1014, 20708), (1209, 17368), (1336, 15717), (1352, 15531), (1612, 13026), (2004, 10478), (2028, 10354), (2171, 9672), (2418, 8684), (3224, 6513), (4008, 5239), (4056, 5177), (4342, 4836)]