18025420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{647}}^1$

素因数の和:862

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 25520180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 199, 398, 647, 796, 995, 1294, 1393, 1990, 2588, 2786, 3235, 3980, 4529, 5572, 6470, 6965, 9058, 12940, 13930, 18116, 22645, 27860, 45290, 90580, 128753, 257506, 515012, 643765, 901271, 1287530, 1802542, 2575060, 3605084, 4506355, 9012710, 18025420]

約数ペア:

[(1, 18025420), (2, 9012710), (4, 4506355), (5, 3605084), (7, 2575060), (10, 1802542), (14, 1287530), (20, 901271), (28, 643765), (35, 515012), (70, 257506), (140, 128753), (199, 90580), (398, 45290), (647, 27860), (796, 22645), (995, 18116), (1294, 13930), (1393, 12940), (1990, 9058), (2588, 6965), (2786, 6470), (3235, 5572), (3980, 4529)]