21078512

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{467}}^1$

素因数の和:526

約数の個数: 80

約数和(自身を含む): 51996672

約数和(自身を除く): 30918160

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 31, 52, 56, 62, 91, 104, 112, 124, 182, 208, 217, 248, 364, 403, 434, 467, 496, 728, 806, 868, 934, 1456, 1612, 1736, 1868, 2821, 3224, 3269, 3472, 3736, 5642, 6071, 6448, 6538, 7472, 11284, 12142, 13076, 14477, 22568, 24284, 26152, 28954, 42497, 45136, 48568, 52304, 57908, 84994, 97136, 101339, 115816, 169988, 188201, 202678, 231632, 339976, 376402, 405356, 679952, 752804, 810712, 1317407, 1505608, 1621424, 2634814, 3011216, 5269628, 10539256, 21078512]

約数ペア:

[(1, 21078512), (2, 10539256), (4, 5269628), (7, 3011216), (8, 2634814), (13, 1621424), (14, 1505608), (16, 1317407), (26, 810712), (28, 752804), (31, 679952), (52, 405356), (56, 376402), (62, 339976), (91, 231632), (104, 202678), (112, 188201), (124, 169988), (182, 115816), (208, 101339), (217, 97136), (248, 84994), (364, 57908), (403, 52304), (434, 48568), (467, 45136), (496, 42497), (728, 28954), (806, 26152), (868, 24284), (934, 22568), (1456, 14477), (1612, 13076), (1736, 12142), (1868, 11284), (2821, 7472), (3224, 6538), (3269, 6448), (3472, 6071), (3736, 5642)]