9801981

素因数分解:

$3^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{991}}^1$

素因数の和:1161

約数の個数: 24

約数和(自身を含む): 16300544

約数和(自身を除く): 6498563

約数列:

[1, 3, 7, 9, 21, 63, 157, 471, 991, 1099, 1413, 2973, 3297, 6937, 8919, 9891, 20811, 62433, 155587, 466761, 1089109, 1400283, 3267327, 9801981]

約数ペア:

[(1, 9801981), (3, 3267327), (7, 1400283), (9, 1089109), (21, 466761), (63, 155587), (157, 62433), (471, 20811), (991, 9891), (1099, 8919), (1413, 6937), (2973, 3297)]