21387724

素因数分解:

$2^2\times {\mathrm{97}}^1\times {\mathrm{199}}^1\times {\mathrm{277}}^1$

素因数の和:577

約数の個数: 24

約数和(自身を含む): 38141600

約数和(自身を除く): 16753876

約数列:

[1, 2, 4, 97, 194, 199, 277, 388, 398, 554, 796, 1108, 19303, 26869, 38606, 53738, 55123, 77212, 107476, 110246, 220492, 5346931, 10693862, 21387724]

約数ペア:

[(1, 21387724), (2, 10693862), (4, 5346931), (97, 220492), (194, 110246), (199, 107476), (277, 77212), (388, 55123), (398, 53738), (554, 38606), (796, 26869), (1108, 19303)]