16540880

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1039}}^1$

素因数の和:1251

約数の個数: 40

約数和(自身を含む): 38688000

約数和(自身を除く): 22147120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1039, 1592, 1990, 2078, 3184, 3980, 4156, 5195, 7960, 8312, 10390, 15920, 16624, 20780, 41560, 83120, 206761, 413522, 827044, 1033805, 1654088, 2067610, 3308176, 4135220, 8270440, 16540880]

約数ペア:

[(1, 16540880), (2, 8270440), (4, 4135220), (5, 3308176), (8, 2067610), (10, 1654088), (16, 1033805), (20, 827044), (40, 413522), (80, 206761), (199, 83120), (398, 41560), (796, 20780), (995, 16624), (1039, 15920), (1592, 10390), (1990, 8312), (2078, 7960), (3184, 5195), (3980, 4156)]