21140392

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:506

約数の個数: 64

約数和(自身を含む): 49593600

約数和(自身を除く): 28453208

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 71, 91, 104, 142, 182, 284, 364, 409, 497, 568, 728, 818, 923, 994, 1636, 1846, 1988, 2863, 3272, 3692, 3976, 5317, 5726, 6461, 7384, 10634, 11452, 12922, 21268, 22904, 25844, 29039, 37219, 42536, 51688, 58078, 74438, 116156, 148876, 203273, 232312, 297752, 377507, 406546, 755014, 813092, 1510028, 1626184, 2642549, 3020056, 5285098, 10570196, 21140392]

約数ペア:

[(1, 21140392), (2, 10570196), (4, 5285098), (7, 3020056), (8, 2642549), (13, 1626184), (14, 1510028), (26, 813092), (28, 755014), (52, 406546), (56, 377507), (71, 297752), (91, 232312), (104, 203273), (142, 148876), (182, 116156), (284, 74438), (364, 58078), (409, 51688), (497, 42536), (568, 37219), (728, 29039), (818, 25844), (923, 22904), (994, 21268), (1636, 12922), (1846, 11452), (1988, 10634), (2863, 7384), (3272, 6461), (3692, 5726), (3976, 5317)]