19394540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{443}}^1$

素因数の和:662

約数の個数: 48

約数和(自身を含む): 44755200

約数和(自身を除く): 25360660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 443, 796, 886, 995, 1772, 1990, 2189, 2215, 3980, 4378, 4430, 4873, 8756, 8860, 9746, 10945, 19492, 21890, 24365, 43780, 48730, 88157, 97460, 176314, 352628, 440785, 881570, 969727, 1763140, 1939454, 3878908, 4848635, 9697270, 19394540]

約数ペア:

[(1, 19394540), (2, 9697270), (4, 4848635), (5, 3878908), (10, 1939454), (11, 1763140), (20, 969727), (22, 881570), (44, 440785), (55, 352628), (110, 176314), (199, 97460), (220, 88157), (398, 48730), (443, 43780), (796, 24365), (886, 21890), (995, 19492), (1772, 10945), (1990, 9746), (2189, 8860), (2215, 8756), (3980, 4873), (4378, 4430)]