18987811

素因数分解:

${\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{263}}^1$

素因数の和:402

約数の個数: 16

約数和(自身を含む): 20630016

約数和(自身を除く): 1642205

約数列:

[1, 23, 43, 73, 263, 989, 1679, 3139, 6049, 11309, 19199, 72197, 260107, 441577, 825557, 18987811]

約数ペア:

[(1, 18987811), (23, 825557), (43, 441577), (73, 260107), (263, 72197), (989, 19199), (1679, 11309), (3139, 6049)]