21128007

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{7121}}^1$

素因数の和:7190

約数の個数: 16

約数和(自身を含む): 30083328

約数和(自身を除く): 8955321

約数列:

[1, 3, 23, 43, 69, 129, 989, 2967, 7121, 21363, 163783, 306203, 491349, 918609, 7042669, 21128007]

約数ペア:

[(1, 21128007), (3, 7042669), (23, 918609), (43, 491349), (69, 306203), (129, 163783), (989, 21363), (2967, 7121)]