21000638888

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1\times {\mathrm{521}}^1$

素因数の和:735

約数の個数: 128

約数和(自身を含む): 43296768000

約数和(自身を除く): 22296129112

約数列:

[1, 2, 4, 8, 23, 46, 47, 59, 79, 92, 94, 118, 158, 184, 188, 236, 316, 376, 472, 521, 632, 1042, 1081, 1357, 1817, 2084, 2162, 2714, 2773, 3634, 3713, 4168, 4324, 4661, 5428, 5546, 7268, 7426, 8648, 9322, 10856, 11092, 11983, 14536, 14852, 18644, 22184, 23966, 24487, 29704, 30739, 37288, 41159, 47932, 48974, 61478, 63779, 82318, 85399, 95864, 97948, 107203, 122956, 127558, 164636, 170798, 195896, 214406, 219067, 245912, 255116, 329272, 341596, 428812, 438134, 510232, 563201, 683192, 706997, 857624, 876268, 946657, 1126402, 1413994, 1444733, 1752536, 1893314, 1934473, 2252804, 2428381, 2827988, 2889466, 3786628, 3868946, 4505608, 4856762, 5038541, 5655976, 5778932, 7573256, 7737892, 9713524, 10077082, 11557864, 15475784, 19427048, 20154164, 33228859, 40308328, 44492879, 55852763, 66457718, 88985758, 111705526, 114133907, 132915436, 177971516, 223411052, 228267814, 265830872, 355943032, 446822104, 456535628, 913071256, 2625079861, 5250159722, 10500319444, 21000638888]

約数ペア:

[(1, 21000638888), (2, 10500319444), (4, 5250159722), (8, 2625079861), (23, 913071256), (46, 456535628), (47, 446822104), (59, 355943032), (79, 265830872), (92, 228267814), (94, 223411052), (118, 177971516), (158, 132915436), (184, 114133907), (188, 111705526), (236, 88985758), (316, 66457718), (376, 55852763), (472, 44492879), (521, 40308328), (632, 33228859), (1042, 20154164), (1081, 19427048), (1357, 15475784), (1817, 11557864), (2084, 10077082), (2162, 9713524), (2714, 7737892), (2773, 7573256), (3634, 5778932), (3713, 5655976), (4168, 5038541), (4324, 4856762), (4661, 4505608), (5428, 3868946), (5546, 3786628), (7268, 2889466), (7426, 2827988), (8648, 2428381), (9322, 2252804), (10856, 1934473), (11092, 1893314), (11983, 1752536), (14536, 1444733), (14852, 1413994), (18644, 1126402), (22184, 946657), (23966, 876268), (24487, 857624), (29704, 706997), (30739, 683192), (37288, 563201), (41159, 510232), (47932, 438134), (48974, 428812), (61478, 341596), (63779, 329272), (82318, 255116), (85399, 245912), (95864, 219067), (97948, 214406), (107203, 195896), (122956, 170798), (127558, 164636)]