20497815

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{947}}^1$

素因数の和:1008

約数の個数: 48

約数和(自身を含む): 39338208

約数和(自身を除く): 18840393

約数列:

[1, 3, 5, 9, 13, 15, 37, 39, 45, 65, 111, 117, 185, 195, 333, 481, 555, 585, 947, 1443, 1665, 2405, 2841, 4329, 4735, 7215, 8523, 12311, 14205, 21645, 35039, 36933, 42615, 61555, 105117, 110799, 175195, 184665, 315351, 455507, 525585, 553995, 1366521, 1576755, 2277535, 4099563, 6832605, 20497815]

約数ペア:

[(1, 20497815), (3, 6832605), (5, 4099563), (9, 2277535), (13, 1576755), (15, 1366521), (37, 553995), (39, 525585), (45, 455507), (65, 315351), (111, 184665), (117, 175195), (185, 110799), (195, 105117), (333, 61555), (481, 42615), (555, 36933), (585, 35039), (947, 21645), (1443, 14205), (1665, 12311), (2405, 8523), (2841, 7215), (4329, 4735)]