20181021

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{1367}}^1$

素因数の和:1433

約数の個数: 32

約数和(自身を含む): 33269760

約数和(自身を除く): 13088739

約数列:

[1, 3, 7, 19, 21, 37, 57, 111, 133, 259, 399, 703, 777, 1367, 2109, 4101, 4921, 9569, 14763, 25973, 28707, 50579, 77919, 151737, 181811, 354053, 545433, 961001, 1062159, 2883003, 6727007, 20181021]

約数ペア:

[(1, 20181021), (3, 6727007), (7, 2883003), (19, 1062159), (21, 961001), (37, 545433), (57, 354053), (111, 181811), (133, 151737), (259, 77919), (399, 50579), (703, 28707), (777, 25973), (1367, 14763), (2109, 9569), (4101, 4921)]