19877911

素因数分解:

${\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{199}}^1$

素因数の和:366

約数の個数: 16

約数和(自身を含む): 21542400

約数和(自身を除く): 1664489

約数列:

[1, 23, 43, 101, 199, 989, 2323, 4343, 4577, 8557, 20099, 99889, 196811, 462277, 864257, 19877911]

約数ペア:

[(1, 19877911), (23, 864257), (43, 462277), (101, 196811), (199, 99889), (989, 20099), (2323, 8557), (4343, 4577)]