12821289

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{521}}^1\times {\mathrm{631}}^1$

素因数の和:1168

約数の個数: 16

約数和(自身を含む): 18474624

約数和(自身を除く): 5653335

約数列:

[1, 3, 13, 39, 521, 631, 1563, 1893, 6773, 8203, 20319, 24609, 328751, 986253, 4273763, 12821289]

約数ペア:

[(1, 12821289), (3, 4273763), (13, 986253), (39, 328751), (521, 24609), (631, 20319), (1563, 8203), (1893, 6773)]