20421999

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{7589}}^1$

素因数の和:7631

約数の個数: 24

約数和(自身を含む): 33153120

約数和(自身を除く): 12731121

約数列:

[1, 3, 9, 13, 23, 39, 69, 117, 207, 299, 897, 2691, 7589, 22767, 68301, 98657, 174547, 295971, 523641, 887913, 1570923, 2269111, 6807333, 20421999]

約数ペア:

[(1, 20421999), (3, 6807333), (9, 2269111), (13, 1570923), (23, 887913), (39, 523641), (69, 295971), (117, 174547), (207, 98657), (299, 68301), (897, 22767), (2691, 7589)]