64563560

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{8111}}^1$

素因数の和:8321

約数の個数: 32

約数和(自身を含む): 146016000

約数和(自身を除く): 81452440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 3980, 7960, 8111, 16222, 32444, 40555, 64888, 81110, 162220, 324440, 1614089, 3228178, 6456356, 8070445, 12912712, 16140890, 32281780, 64563560]

約数ペア:

[(1, 64563560), (2, 32281780), (4, 16140890), (5, 12912712), (8, 8070445), (10, 6456356), (20, 3228178), (40, 1614089), (199, 324440), (398, 162220), (796, 81110), (995, 64888), (1592, 40555), (1990, 32444), (3980, 16222), (7960, 8111)]