20821724

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{1009}}^1$

素因数の和:1098

約数の個数: 48

約数和(自身を含む): 46152960

約数和(自身を除く): 25331236

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 67, 77, 134, 154, 268, 308, 469, 737, 938, 1009, 1474, 1876, 2018, 2948, 4036, 5159, 7063, 10318, 11099, 14126, 20636, 22198, 28252, 44396, 67603, 77693, 135206, 155386, 270412, 310772, 473221, 743633, 946442, 1487266, 1892884, 2974532, 5205431, 10410862, 20821724]

約数ペア:

[(1, 20821724), (2, 10410862), (4, 5205431), (7, 2974532), (11, 1892884), (14, 1487266), (22, 946442), (28, 743633), (44, 473221), (67, 310772), (77, 270412), (134, 155386), (154, 135206), (268, 77693), (308, 67603), (469, 44396), (737, 28252), (938, 22198), (1009, 20636), (1474, 14126), (1876, 11099), (2018, 10318), (2948, 7063), (4036, 5159)]