19902981

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{463}}^1$

素因数の和:585

約数の個数: 32

約数和(自身を含む): 32071680

約数和(自身を除く): 12168699

約数列:

[1, 3, 7, 21, 23, 69, 89, 161, 267, 463, 483, 623, 1389, 1869, 2047, 3241, 6141, 9723, 10649, 14329, 31947, 41207, 42987, 74543, 123621, 223629, 288449, 865347, 947761, 2843283, 6634327, 19902981]

約数ペア:

[(1, 19902981), (3, 6634327), (7, 2843283), (21, 947761), (23, 865347), (69, 288449), (89, 223629), (161, 123621), (267, 74543), (463, 42987), (483, 41207), (623, 31947), (1389, 14329), (1869, 10649), (2047, 9723), (3241, 6141)]