20686959

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{37}}^2\times {\mathrm{73}}^1$

素因数の和:176

約数の個数: 36

約数和(自身を含む): 32484816

約数和(自身を除く): 11797857

約数列:

[1, 3, 9, 23, 37, 69, 73, 111, 207, 219, 333, 657, 851, 1369, 1679, 2553, 2701, 4107, 5037, 7659, 8103, 12321, 15111, 24309, 31487, 62123, 94461, 99937, 186369, 283383, 299811, 559107, 899433, 2298551, 6895653, 20686959]

約数ペア:

[(1, 20686959), (3, 6895653), (9, 2298551), (23, 899433), (37, 559107), (69, 299811), (73, 283383), (111, 186369), (207, 99937), (219, 94461), (333, 62123), (657, 31487), (851, 24309), (1369, 15111), (1679, 12321), (2553, 8103), (2701, 7659), (4107, 5037)]