20940140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1873}}^1$

素因数の和:1938

約数の個数: 48

約数和(自身を含む): 48484128

約数和(自身を除く): 27543988

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 86, 130, 172, 215, 260, 430, 559, 860, 1118, 1873, 2236, 2795, 3746, 5590, 7492, 9365, 11180, 18730, 24349, 37460, 48698, 80539, 97396, 121745, 161078, 243490, 322156, 402695, 486980, 805390, 1047007, 1610780, 2094014, 4188028, 5235035, 10470070, 20940140]

約数ペア:

[(1, 20940140), (2, 10470070), (4, 5235035), (5, 4188028), (10, 2094014), (13, 1610780), (20, 1047007), (26, 805390), (43, 486980), (52, 402695), (65, 322156), (86, 243490), (130, 161078), (172, 121745), (215, 97396), (260, 80539), (430, 48698), (559, 37460), (860, 24349), (1118, 18730), (1873, 11180), (2236, 9365), (2795, 7492), (3746, 5590)]