21111512

素因数分解:

$2^3\times {\mathrm{89}}^1\times {\mathrm{149}}^1\times {\mathrm{199}}^1$

素因数の和:443

約数の個数: 32

約数和(自身を含む): 40500000

約数和(自身を除く): 19388488

約数列:

[1, 2, 4, 8, 89, 149, 178, 199, 298, 356, 398, 596, 712, 796, 1192, 1592, 13261, 17711, 26522, 29651, 35422, 53044, 59302, 70844, 106088, 118604, 141688, 237208, 2638939, 5277878, 10555756, 21111512]

約数ペア:

[(1, 21111512), (2, 10555756), (4, 5277878), (8, 2638939), (89, 237208), (149, 141688), (178, 118604), (199, 106088), (298, 70844), (356, 59302), (398, 53044), (596, 35422), (712, 29651), (796, 26522), (1192, 17711), (1592, 13261)]