21721308

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:132

約数の個数: 144

約数和(自身を含む): 65155104

約数和(自身を除く): 43433796

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 17, 21, 28, 34, 41, 42, 49, 51, 53, 68, 82, 84, 98, 102, 106, 119, 123, 147, 159, 164, 196, 204, 212, 238, 246, 287, 294, 318, 357, 371, 476, 492, 574, 588, 636, 697, 714, 742, 833, 861, 901, 1113, 1148, 1394, 1428, 1484, 1666, 1722, 1802, 2009, 2091, 2173, 2226, 2499, 2597, 2703, 2788, 3332, 3444, 3604, 4018, 4182, 4346, 4452, 4879, 4998, 5194, 5406, 6027, 6307, 6519, 7791, 8036, 8364, 8692, 9758, 9996, 10388, 10812, 12054, 12614, 13038, 14637, 15211, 15582, 18921, 19516, 24108, 25228, 26076, 29274, 30422, 31164, 34153, 36941, 37842, 44149, 45633, 58548, 60844, 68306, 73882, 75684, 88298, 91266, 102459, 106477, 110823, 132447, 136612, 147764, 176596, 182532, 204918, 212954, 221646, 258587, 264894, 319431, 409836, 425908, 443292, 517174, 529788, 638862, 775761, 1034348, 1277724, 1551522, 1810109, 3103044, 3620218, 5430327, 7240436, 10860654, 21721308]

約数ペア:

[(1, 21721308), (2, 10860654), (3, 7240436), (4, 5430327), (6, 3620218), (7, 3103044), (12, 1810109), (14, 1551522), (17, 1277724), (21, 1034348), (28, 775761), (34, 638862), (41, 529788), (42, 517174), (49, 443292), (51, 425908), (53, 409836), (68, 319431), (82, 264894), (84, 258587), (98, 221646), (102, 212954), (106, 204918), (119, 182532), (123, 176596), (147, 147764), (159, 136612), (164, 132447), (196, 110823), (204, 106477), (212, 102459), (238, 91266), (246, 88298), (287, 75684), (294, 73882), (318, 68306), (357, 60844), (371, 58548), (476, 45633), (492, 44149), (574, 37842), (588, 36941), (636, 34153), (697, 31164), (714, 30422), (742, 29274), (833, 26076), (861, 25228), (901, 24108), (1113, 19516), (1148, 18921), (1394, 15582), (1428, 15211), (1484, 14637), (1666, 13038), (1722, 12614), (1802, 12054), (2009, 10812), (2091, 10388), (2173, 9996), (2226, 9758), (2499, 8692), (2597, 8364), (2703, 8036), (2788, 7791), (3332, 6519), (3444, 6307), (3604, 6027), (4018, 5406), (4182, 5194), (4346, 4998), (4452, 4879)]