81777215

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^2\times {\mathrm{919}}^1$

素因数の和:1011

約数の個数: 24

約数和(自身を含む): 108732960

約数和(自身を除く): 26955745

約数列:

[1, 5, 13, 37, 65, 185, 481, 919, 1369, 2405, 4595, 6845, 11947, 17797, 34003, 59735, 88985, 170015, 442039, 1258111, 2210195, 6290555, 16355443, 81777215]

約数ペア:

[(1, 81777215), (5, 16355443), (13, 6290555), (37, 2210195), (65, 1258111), (185, 442039), (481, 170015), (919, 88985), (1369, 59735), (2405, 34003), (4595, 17797), (6845, 11947)]