21168784

素因数分解:

$2^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:133

約数の個数: 120

約数和(自身を含む): 53829888

約数和(自身を除く): 32661104

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 31, 49, 52, 56, 62, 67, 91, 98, 104, 112, 124, 134, 182, 196, 208, 217, 248, 268, 364, 392, 403, 434, 469, 496, 536, 637, 728, 784, 806, 868, 871, 938, 1072, 1274, 1456, 1519, 1612, 1736, 1742, 1876, 2077, 2548, 2821, 3038, 3224, 3283, 3472, 3484, 3752, 4154, 5096, 5642, 6076, 6097, 6448, 6566, 6968, 7504, 8308, 10192, 11284, 12152, 12194, 13132, 13936, 14539, 16616, 19747, 22568, 24304, 24388, 26264, 27001, 29078, 33232, 39494, 42679, 45136, 48776, 52528, 54002, 58156, 78988, 85358, 97552, 101773, 108004, 116312, 157976, 170716, 189007, 203546, 216008, 232624, 315952, 341432, 378014, 407092, 432016, 682864, 756028, 814184, 1323049, 1512056, 1628368, 2646098, 3024112, 5292196, 10584392, 21168784]

約数ペア:

[(1, 21168784), (2, 10584392), (4, 5292196), (7, 3024112), (8, 2646098), (13, 1628368), (14, 1512056), (16, 1323049), (26, 814184), (28, 756028), (31, 682864), (49, 432016), (52, 407092), (56, 378014), (62, 341432), (67, 315952), (91, 232624), (98, 216008), (104, 203546), (112, 189007), (124, 170716), (134, 157976), (182, 116312), (196, 108004), (208, 101773), (217, 97552), (248, 85358), (268, 78988), (364, 58156), (392, 54002), (403, 52528), (434, 48776), (469, 45136), (496, 42679), (536, 39494), (637, 33232), (728, 29078), (784, 27001), (806, 26264), (868, 24388), (871, 24304), (938, 22568), (1072, 19747), (1274, 16616), (1456, 14539), (1519, 13936), (1612, 13132), (1736, 12194), (1742, 12152), (1876, 11284), (2077, 10192), (2548, 8308), (2821, 7504), (3038, 6968), (3224, 6566), (3283, 6448), (3472, 6097), (3484, 6076), (3752, 5642), (4154, 5096)]