21081160

素因数分解:

$2^3\times 5^1\times {\mathrm{353}}^1\times {\mathrm{1493}}^1$

素因数の和:1857

約数の個数: 32

約数和(自身を含む): 47598840

約数和(自身を除く): 26517680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 353, 706, 1412, 1493, 1765, 2824, 2986, 3530, 5972, 7060, 7465, 11944, 14120, 14930, 29860, 59720, 527029, 1054058, 2108116, 2635145, 4216232, 5270290, 10540580, 21081160]

約数ペア:

[(1, 21081160), (2, 10540580), (4, 5270290), (5, 4216232), (8, 2635145), (10, 2108116), (20, 1054058), (40, 527029), (353, 59720), (706, 29860), (1412, 14930), (1493, 14120), (1765, 11944), (2824, 7465), (2986, 7060), (3530, 5972)]