20561156

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{241}}^1\times {\mathrm{277}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 45209472

約数和(自身を除く): 24648316

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 241, 277, 308, 482, 554, 964, 1108, 1687, 1939, 2651, 3047, 3374, 3878, 5302, 6094, 6748, 7756, 10604, 12188, 18557, 21329, 37114, 42658, 66757, 74228, 85316, 133514, 267028, 467299, 734327, 934598, 1468654, 1869196, 2937308, 5140289, 10280578, 20561156]

約数ペア:

[(1, 20561156), (2, 10280578), (4, 5140289), (7, 2937308), (11, 1869196), (14, 1468654), (22, 934598), (28, 734327), (44, 467299), (77, 267028), (154, 133514), (241, 85316), (277, 74228), (308, 66757), (482, 42658), (554, 37114), (964, 21329), (1108, 18557), (1687, 12188), (1939, 10604), (2651, 7756), (3047, 6748), (3374, 6094), (3878, 5302)]