21181784

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{15667}}^1$

素因数の和:15699

約数の個数: 24

約数和(自身を含む): 43008660

約数和(自身を除く): 21826876

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 169, 338, 676, 1352, 15667, 31334, 62668, 125336, 203671, 407342, 814684, 1629368, 2647723, 5295446, 10590892, 21181784]

約数ペア:

[(1, 21181784), (2, 10590892), (4, 5295446), (8, 2647723), (13, 1629368), (26, 814684), (52, 407342), (104, 203671), (169, 125336), (338, 62668), (676, 31334), (1352, 15667)]