21035772

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{127}}^1$

素因数の和:287

約数の個数: 72

約数和(自身を含む): 55351296

約数和(自身を除く): 34315524

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 86, 107, 127, 129, 172, 214, 254, 258, 321, 381, 387, 428, 508, 516, 642, 762, 774, 963, 1143, 1284, 1524, 1548, 1926, 2286, 3852, 4572, 4601, 5461, 9202, 10922, 13589, 13803, 16383, 18404, 21844, 27178, 27606, 32766, 40767, 41409, 49149, 54356, 55212, 65532, 81534, 82818, 98298, 122301, 163068, 165636, 196596, 244602, 489204, 584327, 1168654, 1752981, 2337308, 3505962, 5258943, 7011924, 10517886, 21035772]

約数ペア:

[(1, 21035772), (2, 10517886), (3, 7011924), (4, 5258943), (6, 3505962), (9, 2337308), (12, 1752981), (18, 1168654), (36, 584327), (43, 489204), (86, 244602), (107, 196596), (127, 165636), (129, 163068), (172, 122301), (214, 98298), (254, 82818), (258, 81534), (321, 65532), (381, 55212), (387, 54356), (428, 49149), (508, 41409), (516, 40767), (642, 32766), (762, 27606), (774, 27178), (963, 21844), (1143, 18404), (1284, 16383), (1524, 13803), (1548, 13589), (1926, 10922), (2286, 9202), (3852, 5461), (4572, 4601)]