20656168

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:242

約数の個数: 64

約数和(自身を含む): 44352000

約数和(自身を除く): 23695832

約数列:

[1, 2, 4, 8, 13, 26, 31, 43, 52, 62, 86, 104, 124, 149, 172, 248, 298, 344, 403, 559, 596, 806, 1118, 1192, 1333, 1612, 1937, 2236, 2666, 3224, 3874, 4472, 4619, 5332, 6407, 7748, 9238, 10664, 12814, 15496, 17329, 18476, 25628, 34658, 36952, 51256, 60047, 69316, 83291, 120094, 138632, 166582, 198617, 240188, 333164, 397234, 480376, 666328, 794468, 1588936, 2582021, 5164042, 10328084, 20656168]

約数ペア:

[(1, 20656168), (2, 10328084), (4, 5164042), (8, 2582021), (13, 1588936), (26, 794468), (31, 666328), (43, 480376), (52, 397234), (62, 333164), (86, 240188), (104, 198617), (124, 166582), (149, 138632), (172, 120094), (248, 83291), (298, 69316), (344, 60047), (403, 51256), (559, 36952), (596, 34658), (806, 25628), (1118, 18476), (1192, 17329), (1333, 15496), (1612, 12814), (1937, 10664), (2236, 9238), (2666, 7748), (3224, 6407), (3874, 5332), (4472, 4619)]