18033380

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{199}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 39916800

約数和(自身を除く): 21883420

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 197, 199, 230, 394, 398, 460, 788, 796, 985, 995, 1970, 1990, 3940, 3980, 4531, 4577, 9062, 9154, 18124, 18308, 22655, 22885, 39203, 45310, 45770, 78406, 90620, 91540, 156812, 196015, 392030, 784060, 901669, 1803338, 3606676, 4508345, 9016690, 18033380]

約数ペア:

[(1, 18033380), (2, 9016690), (4, 4508345), (5, 3606676), (10, 1803338), (20, 901669), (23, 784060), (46, 392030), (92, 196015), (115, 156812), (197, 91540), (199, 90620), (230, 78406), (394, 45770), (398, 45310), (460, 39203), (788, 22885), (796, 22655), (985, 18308), (995, 18124), (1970, 9154), (1990, 9062), (3940, 4577), (3980, 4531)]