18749780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{673}}^1$

素因数の和:888

約数の個数: 48

約数和(自身を含む): 45292800

約数和(自身を除く): 26543020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 199, 398, 673, 796, 995, 1346, 1393, 1990, 2692, 2786, 3365, 3980, 4711, 5572, 6730, 6965, 9422, 13460, 13930, 18844, 23555, 27860, 47110, 94220, 133927, 267854, 535708, 669635, 937489, 1339270, 1874978, 2678540, 3749956, 4687445, 9374890, 18749780]

約数ペア:

[(1, 18749780), (2, 9374890), (4, 4687445), (5, 3749956), (7, 2678540), (10, 1874978), (14, 1339270), (20, 937489), (28, 669635), (35, 535708), (70, 267854), (140, 133927), (199, 94220), (398, 47110), (673, 27860), (796, 23555), (995, 18844), (1346, 13930), (1393, 13460), (1990, 9422), (2692, 6965), (2786, 6730), (3365, 5572), (3980, 4711)]