21428964

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:289

約数の個数: 72

約数和(自身を含む): 56376320

約数和(自身を除く): 34947356

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 86, 109, 127, 129, 172, 218, 254, 258, 327, 381, 387, 436, 508, 516, 654, 762, 774, 981, 1143, 1308, 1524, 1548, 1962, 2286, 3924, 4572, 4687, 5461, 9374, 10922, 13843, 14061, 16383, 18748, 21844, 27686, 28122, 32766, 41529, 42183, 49149, 55372, 56244, 65532, 83058, 84366, 98298, 124587, 166116, 168732, 196596, 249174, 498348, 595249, 1190498, 1785747, 2380996, 3571494, 5357241, 7142988, 10714482, 21428964]

約数ペア:

[(1, 21428964), (2, 10714482), (3, 7142988), (4, 5357241), (6, 3571494), (9, 2380996), (12, 1785747), (18, 1190498), (36, 595249), (43, 498348), (86, 249174), (109, 196596), (127, 168732), (129, 166116), (172, 124587), (218, 98298), (254, 84366), (258, 83058), (327, 65532), (381, 56244), (387, 55372), (436, 49149), (508, 42183), (516, 41529), (654, 32766), (762, 28122), (774, 27686), (981, 21844), (1143, 18748), (1308, 16383), (1524, 14061), (1548, 13843), (1962, 10922), (2286, 9374), (3924, 5461), (4572, 4687)]