20556784

素因数分解:

$2^4\times {\mathrm{19}}^2\times {\mathrm{3559}}^1$

素因数の和:3605

約数の個数: 30

約数和(自身を含む): 42047160

約数和(自身を除く): 21490376

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 361, 722, 1444, 2888, 3559, 5776, 7118, 14236, 28472, 56944, 67621, 135242, 270484, 540968, 1081936, 1284799, 2569598, 5139196, 10278392, 20556784]

約数ペア:

[(1, 20556784), (2, 10278392), (4, 5139196), (8, 2569598), (16, 1284799), (19, 1081936), (38, 540968), (76, 270484), (152, 135242), (304, 67621), (361, 56944), (722, 28472), (1444, 14236), (2888, 7118), (3559, 5776)]