20178954

素因数分解:

$2^1\times 3^2\times {\mathrm{29}}^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:140

約数の個数: 72

約数和(自身を含む): 47828352

約数和(自身を除く): 27649398

約数列:

[1, 2, 3, 6, 9, 18, 29, 31, 43, 58, 62, 86, 87, 93, 129, 174, 186, 258, 261, 279, 387, 522, 558, 774, 841, 899, 1247, 1333, 1682, 1798, 2494, 2523, 2666, 2697, 3741, 3999, 5046, 5394, 7482, 7569, 7998, 8091, 11223, 11997, 15138, 16182, 22446, 23994, 26071, 36163, 38657, 52142, 72326, 77314, 78213, 108489, 115971, 156426, 216978, 231942, 234639, 325467, 347913, 469278, 650934, 695826, 1121053, 2242106, 3363159, 6726318, 10089477, 20178954]

約数ペア:

[(1, 20178954), (2, 10089477), (3, 6726318), (6, 3363159), (9, 2242106), (18, 1121053), (29, 695826), (31, 650934), (43, 469278), (58, 347913), (62, 325467), (86, 234639), (87, 231942), (93, 216978), (129, 156426), (174, 115971), (186, 108489), (258, 78213), (261, 77314), (279, 72326), (387, 52142), (522, 38657), (558, 36163), (774, 26071), (841, 23994), (899, 22446), (1247, 16182), (1333, 15138), (1682, 11997), (1798, 11223), (2494, 8091), (2523, 7998), (2666, 7569), (2697, 7482), (3741, 5394), (3999, 5046)]