21056868

素因数分解:

$2^2\times 3^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:223

約数の個数: 144

約数和(自身を含む): 66648960

約数和(自身を除く): 45592092

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 23, 27, 28, 36, 42, 46, 49, 54, 63, 69, 84, 92, 98, 108, 126, 138, 147, 161, 173, 189, 196, 207, 252, 276, 294, 322, 346, 378, 414, 441, 483, 519, 588, 621, 644, 692, 756, 828, 882, 966, 1038, 1127, 1211, 1242, 1323, 1449, 1557, 1764, 1932, 2076, 2254, 2422, 2484, 2646, 2898, 3114, 3381, 3633, 3979, 4347, 4508, 4671, 4844, 5292, 5796, 6228, 6762, 7266, 7958, 8477, 8694, 9342, 10143, 10899, 11937, 13524, 14532, 15916, 16954, 17388, 18684, 20286, 21798, 23874, 25431, 27853, 30429, 32697, 33908, 35811, 40572, 43596, 47748, 50862, 55706, 60858, 65394, 71622, 76293, 83559, 101724, 107433, 111412, 121716, 130788, 143244, 152586, 167118, 194971, 214866, 228879, 250677, 305172, 334236, 389942, 429732, 457758, 501354, 584913, 752031, 779884, 915516, 1002708, 1169826, 1504062, 1754739, 2339652, 3008124, 3509478, 5264217, 7018956, 10528434, 21056868]

約数ペア:

[(1, 21056868), (2, 10528434), (3, 7018956), (4, 5264217), (6, 3509478), (7, 3008124), (9, 2339652), (12, 1754739), (14, 1504062), (18, 1169826), (21, 1002708), (23, 915516), (27, 779884), (28, 752031), (36, 584913), (42, 501354), (46, 457758), (49, 429732), (54, 389942), (63, 334236), (69, 305172), (84, 250677), (92, 228879), (98, 214866), (108, 194971), (126, 167118), (138, 152586), (147, 143244), (161, 130788), (173, 121716), (189, 111412), (196, 107433), (207, 101724), (252, 83559), (276, 76293), (294, 71622), (322, 65394), (346, 60858), (378, 55706), (414, 50862), (441, 47748), (483, 43596), (519, 40572), (588, 35811), (621, 33908), (644, 32697), (692, 30429), (756, 27853), (828, 25431), (882, 23874), (966, 21798), (1038, 20286), (1127, 18684), (1211, 17388), (1242, 16954), (1323, 15916), (1449, 14532), (1557, 13524), (1764, 11937), (1932, 10899), (2076, 10143), (2254, 9342), (2422, 8694), (2484, 8477), (2646, 7958), (2898, 7266), (3114, 6762), (3381, 6228), (3633, 5796), (3979, 5292), (4347, 4844), (4508, 4671)]