21200751

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1$

素因数の和:86

約数の個数: 96

約数和(自身を含む): 41260800

約数和(自身を除く): 20060049

約数列:

[1, 3, 9, 11, 13, 17, 19, 27, 33, 39, 51, 57, 99, 117, 143, 153, 171, 187, 209, 221, 247, 289, 297, 323, 351, 429, 459, 513, 561, 627, 663, 741, 867, 969, 1287, 1683, 1881, 1989, 2223, 2431, 2601, 2717, 2907, 3179, 3553, 3757, 3861, 4199, 5049, 5491, 5643, 5967, 6669, 7293, 7803, 8151, 8721, 9537, 10659, 11271, 12597, 16473, 21879, 24453, 28611, 31977, 33813, 37791, 41327, 46189, 49419, 60401, 65637, 71383, 73359, 85833, 95931, 101439, 113373, 123981, 138567, 148257, 181203, 214149, 371943, 415701, 543609, 642447, 785213, 1115829, 1247103, 1630827, 1927341, 2355639, 7066917, 21200751]

約数ペア:

[(1, 21200751), (3, 7066917), (9, 2355639), (11, 1927341), (13, 1630827), (17, 1247103), (19, 1115829), (27, 785213), (33, 642447), (39, 543609), (51, 415701), (57, 371943), (99, 214149), (117, 181203), (143, 148257), (153, 138567), (171, 123981), (187, 113373), (209, 101439), (221, 95931), (247, 85833), (289, 73359), (297, 71383), (323, 65637), (351, 60401), (429, 49419), (459, 46189), (513, 41327), (561, 37791), (627, 33813), (663, 31977), (741, 28611), (867, 24453), (969, 21879), (1287, 16473), (1683, 12597), (1881, 11271), (1989, 10659), (2223, 9537), (2431, 8721), (2601, 8151), (2717, 7803), (2907, 7293), (3179, 6669), (3553, 5967), (3757, 5643), (3861, 5491), (4199, 5049)]