20986580

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1061}}^1$

素因数の和:1136

約数の個数: 48

約数和(自身を含む): 47101824

約数和(自身を除く): 26115244

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1061, 1978, 2122, 3956, 4244, 4945, 5305, 9890, 10610, 19780, 21220, 24403, 45623, 48806, 91246, 97612, 122015, 182492, 228115, 244030, 456230, 488060, 912460, 1049329, 2098658, 4197316, 5246645, 10493290, 20986580]

約数ペア:

[(1, 20986580), (2, 10493290), (4, 5246645), (5, 4197316), (10, 2098658), (20, 1049329), (23, 912460), (43, 488060), (46, 456230), (86, 244030), (92, 228115), (115, 182492), (172, 122015), (215, 97612), (230, 91246), (430, 48806), (460, 45623), (860, 24403), (989, 21220), (1061, 19780), (1978, 10610), (2122, 9890), (3956, 5305), (4244, 4945)]