21004256

素因数分解:

$2^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7213}}^1$

素因数の和:7243

約数の個数: 48

約数和(自身を含む): 50901984

約数和(自身を除く): 29897728

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 91, 104, 112, 182, 208, 224, 364, 416, 728, 1456, 2912, 7213, 14426, 28852, 50491, 57704, 93769, 100982, 115408, 187538, 201964, 230816, 375076, 403928, 656383, 750152, 807856, 1312766, 1500304, 1615712, 2625532, 3000608, 5251064, 10502128, 21004256]

約数ペア:

[(1, 21004256), (2, 10502128), (4, 5251064), (7, 3000608), (8, 2625532), (13, 1615712), (14, 1500304), (16, 1312766), (26, 807856), (28, 750152), (32, 656383), (52, 403928), (56, 375076), (91, 230816), (104, 201964), (112, 187538), (182, 115408), (208, 100982), (224, 93769), (364, 57704), (416, 50491), (728, 28852), (1456, 14426), (2912, 7213)]