21661920

素因数分解:

$2^5\times 3^2\times 5^1\times 7^2\times {\mathrm{307}}^1$

素因数の和:342

約数の個数: 216

約数和(自身を含む): 86270184

約数和(自身を除く): 64608264

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 49, 56, 60, 63, 70, 72, 80, 84, 90, 96, 98, 105, 112, 120, 126, 140, 144, 147, 160, 168, 180, 196, 210, 224, 240, 245, 252, 280, 288, 294, 307, 315, 336, 360, 392, 420, 441, 480, 490, 504, 560, 588, 614, 630, 672, 720, 735, 784, 840, 882, 921, 980, 1008, 1120, 1176, 1228, 1260, 1440, 1470, 1535, 1568, 1680, 1764, 1842, 1960, 2016, 2149, 2205, 2352, 2456, 2520, 2763, 2940, 3070, 3360, 3528, 3684, 3920, 4298, 4410, 4605, 4704, 4912, 5040, 5526, 5880, 6140, 6447, 7056, 7368, 7840, 8596, 8820, 9210, 9824, 10080, 10745, 11052, 11760, 12280, 12894, 13815, 14112, 14736, 15043, 17192, 17640, 18420, 19341, 21490, 22104, 23520, 24560, 25788, 27630, 29472, 30086, 32235, 34384, 35280, 36840, 38682, 42980, 44208, 45129, 49120, 51576, 55260, 60172, 64470, 68768, 70560, 73680, 75215, 77364, 85960, 88416, 90258, 96705, 103152, 110520, 120344, 128940, 135387, 147360, 150430, 154728, 171920, 180516, 193410, 206304, 221040, 225645, 240688, 257880, 270774, 300860, 309456, 343840, 361032, 386820, 442080, 451290, 481376, 515760, 541548, 601720, 618912, 676935, 722064, 773640, 902580, 1031520, 1083096, 1203440, 1353870, 1444128, 1547280, 1805160, 2166192, 2406880, 2707740, 3094560, 3610320, 4332384, 5415480, 7220640, 10830960, 21661920]

約数ペア:

[(1, 21661920), (2, 10830960), (3, 7220640), (4, 5415480), (5, 4332384), (6, 3610320), (7, 3094560), (8, 2707740), (9, 2406880), (10, 2166192), (12, 1805160), (14, 1547280), (15, 1444128), (16, 1353870), (18, 1203440), (20, 1083096), (21, 1031520), (24, 902580), (28, 773640), (30, 722064), (32, 676935), (35, 618912), (36, 601720), (40, 541548), (42, 515760), (45, 481376), (48, 451290), (49, 442080), (56, 386820), (60, 361032), (63, 343840), (70, 309456), (72, 300860), (80, 270774), (84, 257880), (90, 240688), (96, 225645), (98, 221040), (105, 206304), (112, 193410), (120, 180516), (126, 171920), (140, 154728), (144, 150430), (147, 147360), (160, 135387), (168, 128940), (180, 120344), (196, 110520), (210, 103152), (224, 96705), (240, 90258), (245, 88416), (252, 85960), (280, 77364), (288, 75215), (294, 73680), (307, 70560), (315, 68768), (336, 64470), (360, 60172), (392, 55260), (420, 51576), (441, 49120), (480, 45129), (490, 44208), (504, 42980), (560, 38682), (588, 36840), (614, 35280), (630, 34384), (672, 32235), (720, 30086), (735, 29472), (784, 27630), (840, 25788), (882, 24560), (921, 23520), (980, 22104), (1008, 21490), (1120, 19341), (1176, 18420), (1228, 17640), (1260, 17192), (1440, 15043), (1470, 14736), (1535, 14112), (1568, 13815), (1680, 12894), (1764, 12280), (1842, 11760), (1960, 11052), (2016, 10745), (2149, 10080), (2205, 9824), (2352, 9210), (2456, 8820), (2520, 8596), (2763, 7840), (2940, 7368), (3070, 7056), (3360, 6447), (3528, 6140), (3684, 5880), (3920, 5526), (4298, 5040), (4410, 4912), (4605, 4704)]