21049796

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 40642560

約数和(自身を除く): 19592764

約数列:

[1, 2, 4, 19, 38, 47, 71, 76, 83, 94, 142, 166, 188, 284, 332, 893, 1349, 1577, 1786, 2698, 3154, 3337, 3572, 3901, 5396, 5893, 6308, 6674, 7802, 11786, 13348, 15604, 23572, 63403, 74119, 111967, 126806, 148238, 223934, 253612, 276971, 296476, 447868, 553942, 1107884, 5262449, 10524898, 21049796]

約数ペア:

[(1, 21049796), (2, 10524898), (4, 5262449), (19, 1107884), (38, 553942), (47, 447868), (71, 296476), (76, 276971), (83, 253612), (94, 223934), (142, 148238), (166, 126806), (188, 111967), (284, 74119), (332, 63403), (893, 23572), (1349, 15604), (1577, 13348), (1786, 11786), (2698, 7802), (3154, 6674), (3337, 6308), (3572, 5893), (3901, 5396)]