21352149

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{31}}^1$

素因数の和:115

約数の個数: 72

約数和(自身を含む): 40581632

約数和(自身を除く): 19229483

約数列:

[1, 3, 7, 9, 13, 21, 29, 31, 39, 63, 87, 91, 93, 117, 203, 217, 261, 273, 279, 377, 403, 609, 651, 819, 841, 899, 1131, 1209, 1827, 1953, 2523, 2639, 2697, 2821, 3393, 3627, 5887, 6293, 7569, 7917, 8091, 8463, 10933, 11687, 17661, 18879, 23751, 25389, 26071, 32799, 35061, 52983, 56637, 76531, 78213, 81809, 98397, 105183, 182497, 229593, 234639, 245427, 338923, 547491, 688779, 736281, 1016769, 1642473, 2372461, 3050307, 7117383, 21352149]

約数ペア:

[(1, 21352149), (3, 7117383), (7, 3050307), (9, 2372461), (13, 1642473), (21, 1016769), (29, 736281), (31, 688779), (39, 547491), (63, 338923), (87, 245427), (91, 234639), (93, 229593), (117, 182497), (203, 105183), (217, 98397), (261, 81809), (273, 78213), (279, 76531), (377, 56637), (403, 52983), (609, 35061), (651, 32799), (819, 26071), (841, 25389), (899, 23751), (1131, 18879), (1209, 17661), (1827, 11687), (1953, 10933), (2523, 8463), (2639, 8091), (2697, 7917), (2821, 7569), (3393, 6293), (3627, 5887)]