21388016

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{107}}^1$

素因数の和:190

約数の個数: 60

約数和(自身を含む): 46543896

約数和(自身を除く): 25155880

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 107, 124, 208, 214, 248, 403, 428, 496, 806, 856, 961, 1391, 1612, 1712, 1922, 2782, 3224, 3317, 3844, 5564, 6448, 6634, 7688, 11128, 12493, 13268, 15376, 22256, 24986, 26536, 43121, 49972, 53072, 86242, 99944, 102827, 172484, 199888, 205654, 344968, 411308, 689936, 822616, 1336751, 1645232, 2673502, 5347004, 10694008, 21388016]

約数ペア:

[(1, 21388016), (2, 10694008), (4, 5347004), (8, 2673502), (13, 1645232), (16, 1336751), (26, 822616), (31, 689936), (52, 411308), (62, 344968), (104, 205654), (107, 199888), (124, 172484), (208, 102827), (214, 99944), (248, 86242), (403, 53072), (428, 49972), (496, 43121), (806, 26536), (856, 24986), (961, 22256), (1391, 15376), (1612, 13268), (1712, 12493), (1922, 11128), (2782, 7688), (3224, 6634), (3317, 6448), (3844, 5564)]