21750009

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{241}}^1\times {\mathrm{449}}^1$

素因数の和:760

約数の個数: 16

約数和(自身を含む): 29620800

約数和(自身を除く): 7870791

約数列:

[1, 3, 67, 201, 241, 449, 723, 1347, 16147, 30083, 48441, 90249, 108209, 324627, 7250003, 21750009]

約数ペア:

[(1, 21750009), (3, 7250003), (67, 324627), (201, 108209), (241, 90249), (449, 48441), (723, 30083), (1347, 16147)]