21565076

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 45501120

約数和(自身を除く): 23936044

約数列:

[1, 2, 4, 13, 19, 23, 26, 38, 46, 52, 73, 76, 92, 146, 169, 247, 292, 299, 338, 437, 494, 598, 676, 874, 949, 988, 1196, 1387, 1679, 1748, 1898, 2774, 3211, 3358, 3796, 3887, 5548, 5681, 6422, 6716, 7774, 11362, 12337, 12844, 15548, 18031, 21827, 22724, 24674, 31901, 36062, 43654, 49348, 63802, 72124, 73853, 87308, 127604, 147706, 234403, 283751, 295412, 414713, 468806, 567502, 829426, 937612, 1135004, 1658852, 5391269, 10782538, 21565076]

約数ペア:

[(1, 21565076), (2, 10782538), (4, 5391269), (13, 1658852), (19, 1135004), (23, 937612), (26, 829426), (38, 567502), (46, 468806), (52, 414713), (73, 295412), (76, 283751), (92, 234403), (146, 147706), (169, 127604), (247, 87308), (292, 73853), (299, 72124), (338, 63802), (437, 49348), (494, 43654), (598, 36062), (676, 31901), (874, 24674), (949, 22724), (988, 21827), (1196, 18031), (1387, 15548), (1679, 12844), (1748, 12337), (1898, 11362), (2774, 7774), (3211, 6716), (3358, 6422), (3796, 5681), (3887, 5548)]