12921009

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{271}}^1\times {\mathrm{691}}^1$

素因数の和:988

約数の個数: 16

約数和(自身を含む): 18069504

約数和(自身を除く): 5148495

約数列:

[1, 3, 23, 69, 271, 691, 813, 2073, 6233, 15893, 18699, 47679, 187261, 561783, 4307003, 12921009]

約数ペア:

[(1, 12921009), (3, 4307003), (23, 561783), (69, 187261), (271, 47679), (691, 18699), (813, 15893), (2073, 6233)]